diff --git a/src/Tgstation.Server.Host/Components/Interop/Bridge/BridgeParameters.cs b/src/Tgstation.Server.Host/Components/Interop/Bridge/BridgeParameters.cs
index e633a4c240..1240bc81cb 100644
--- a/src/Tgstation.Server.Host/Components/Interop/Bridge/BridgeParameters.cs
+++ b/src/Tgstation.Server.Host/Components/Interop/Bridge/BridgeParameters.cs
@@ -50,5 +50,14 @@ namespace Tgstation.Server.Host.Components.Interop.Bridge
 		/// The port that should be used to send world topics, if not the default.
 		/// </summary>
 		public ushort? TopicPort { get; set; }
+
+		/// <summary>
+		/// Initializes a new instance of the <see cref="BridgeParameters"/> class.
+		/// </summary>
+		/// <param name="accessIdentifier">The access identifier for the <see cref="DMApiParameters"/>.</param>
+		public BridgeParameters(string accessIdentifier)
+			: base(accessIdentifier)
+		{
+		}
 	}
 }
diff --git a/src/Tgstation.Server.Host/Components/Interop/DMApiParameters.cs b/src/Tgstation.Server.Host/Components/Interop/DMApiParameters.cs
index 2a31c9efbc..64b774aeb5 100644
--- a/src/Tgstation.Server.Host/Components/Interop/DMApiParameters.cs
+++ b/src/Tgstation.Server.Host/Components/Interop/DMApiParameters.cs
@@ -1,4 +1,5 @@
-using System.ComponentModel.DataAnnotations;
+using System;
+using System.ComponentModel.DataAnnotations;
 
 namespace Tgstation.Server.Host.Components.Interop
 {
@@ -11,6 +12,24 @@ namespace Tgstation.Server.Host.Components.Interop
 		/// Used to identify and authenticate the DreamDaemon instance.
 		/// </summary>
 		[Required]
-		public string? AccessIdentifier { get; set; }
+		public string AccessIdentifier { get; set; }
+
+		/// <summary>
+		/// Initializes a new instance of the <see cref="DMApiParameters"/> class.
+		/// </summary>
+		/// <param name="accessIdentifier">The value of <see cref="AccessIdentifier"/>.</param>
+		public DMApiParameters(string accessIdentifier)
+		{
+			AccessIdentifier = accessIdentifier ?? throw new ArgumentNullException(nameof(accessIdentifier));
+		}
+
+		/// <summary>
+		/// Initializes a new instance of the <see cref="DMApiParameters"/> class.
+		/// </summary>
+		/// <remarks>For use by EFCore only.</remarks>
+		protected DMApiParameters()
+		{
+			AccessIdentifier = null!;
+		}
 	}
 }
diff --git a/src/Tgstation.Server.Host/Components/Interop/Topic/TopicParameters.cs b/src/Tgstation.Server.Host/Components/Interop/Topic/TopicParameters.cs
index f84a404289..bdc8405b02 100644
--- a/src/Tgstation.Server.Host/Components/Interop/Topic/TopicParameters.cs
+++ b/src/Tgstation.Server.Host/Components/Interop/Topic/TopicParameters.cs
@@ -188,6 +188,7 @@ namespace Tgstation.Server.Host.Components.Interop.Topic
 		/// </summary>
 		/// <param name="commandType">The value of <see cref="CommandType"/>.</param>
 		protected TopicParameters(TopicCommandType commandType)
+			: base(String.Empty) // access identifier gets set before send
 		{
 			CommandType = commandType;
 		}
diff --git a/src/Tgstation.Server.Host/Components/Session/ReattachInformation.cs b/src/Tgstation.Server.Host/Components/Session/ReattachInformation.cs
index 3ddeff51d7..31aa0834b7 100644
--- a/src/Tgstation.Server.Host/Components/Session/ReattachInformation.cs
+++ b/src/Tgstation.Server.Host/Components/Session/ReattachInformation.cs
@@ -74,13 +74,12 @@ namespace Tgstation.Server.Host.Components.Session
 			RuntimeInformation runtimeInformation,
 			string accessIdentifier,
 			ushort port)
+			: base(accessIdentifier)
 		{
 			Dmb = dmb ?? throw new ArgumentNullException(nameof(dmb));
 			ProcessId = process?.Id ?? throw new ArgumentNullException(nameof(process));
 			RuntimeInformation = runtimeInformation ?? throw new ArgumentNullException(nameof(runtimeInformation));
 
-			AccessIdentifier = accessIdentifier ?? throw new ArgumentNullException(nameof(accessIdentifier));
-
 			LaunchSecurityLevel = runtimeInformation.SecurityLevel;
 			LaunchVisibility = runtimeInformation.Visibility;
 			Port = port;
diff --git a/src/Tgstation.Server.Host/Components/Session/SessionPersistor.cs b/src/Tgstation.Server.Host/Components/Session/SessionPersistor.cs
index 7eebd9a2af..2cd093c3ee 100644
--- a/src/Tgstation.Server.Host/Components/Session/SessionPersistor.cs
+++ b/src/Tgstation.Server.Host/Components/Session/SessionPersistor.cs
@@ -75,9 +75,8 @@ namespace Tgstation.Server.Host.Components.Session
 
 			await ClearImpl(db, false, cancellationToken);
 
-			var dbReattachInfo = new Models.ReattachInformation
+			var dbReattachInfo = new Models.ReattachInformation(reattachInformation.AccessIdentifier)
 			{
-				AccessIdentifier = reattachInformation.AccessIdentifier,
 				CompileJobId = reattachInformation.Dmb.CompileJob.Id.Value,
 				InitialCompileJobId = reattachInformation.InitialDmb?.CompileJob.Id.Value,
 				Port = reattachInformation.Port,
@@ -103,7 +102,7 @@ namespace Tgstation.Server.Host.Components.Session
 
 			logger.LogTrace("Updating reattach information: {info}...", reattachInformation);
 
-			var dbReattachInfo = new Models.ReattachInformation
+			var dbReattachInfo = new Models.ReattachInformation(String.Empty)
 			{
 				Id = reattachInformation.Id.Value,
 			};
diff --git a/src/Tgstation.Server.Host/Controllers/BridgeController.cs b/src/Tgstation.Server.Host/Controllers/BridgeController.cs
index c4d33be706..4b1a1fac3e 100644
--- a/src/Tgstation.Server.Host/Controllers/BridgeController.cs
+++ b/src/Tgstation.Server.Host/Controllers/BridgeController.cs
@@ -97,10 +97,10 @@ namespace Tgstation.Server.Host.Controllers
 
 			using (LogContext.PushProperty(SerilogContextHelper.BridgeRequestIterationContextProperty, Interlocked.Increment(ref requestsProcessed)))
 			{
-				var request = new BridgeParameters();
+				BridgeParameters? request;
 				try
 				{
-					JsonConvert.PopulateObject(data, request, DMApiConstants.SerializerSettings);
+					request = JsonConvert.DeserializeObject<BridgeParameters>(data, DMApiConstants.SerializerSettings);
 				}
 				catch (Exception ex)
 				{
diff --git a/src/Tgstation.Server.Host/Models/ReattachInformation.cs b/src/Tgstation.Server.Host/Models/ReattachInformation.cs
index 9454e4acf6..49360cf3e5 100644
--- a/src/Tgstation.Server.Host/Models/ReattachInformation.cs
+++ b/src/Tgstation.Server.Host/Models/ReattachInformation.cs
@@ -1,4 +1,5 @@
-using System.ComponentModel.DataAnnotations;
+using System;
+using System.ComponentModel.DataAnnotations;
 
 namespace Tgstation.Server.Host.Models
 {
@@ -27,5 +28,22 @@ namespace Tgstation.Server.Host.Models
 		/// The <see cref="Api.Models.EntityId.Id"/> of <see cref="InitialCompileJob"/>.
 		/// </summary>
 		public long? InitialCompileJobId { get; set; }
+
+		/// <summary>
+		/// Initializes a new instance of the <see cref="ReattachInformation"/> class.
+		/// </summary>
+		[Obsolete("For use by EFCore only", true)]
+		public ReattachInformation()
+		{
+		}
+
+		/// <summary>
+		/// Initializes a new instance of the <see cref="ReattachInformation"/> class.
+		/// </summary>
+		/// <param name="accessIdentifier">The access identifier for the <see cref="ReattachInformationBase"/>.</param>
+		public ReattachInformation(string accessIdentifier)
+			: base(accessIdentifier)
+		{
+		}
 	}
 }
diff --git a/src/Tgstation.Server.Host/Models/ReattachInformationBase.cs b/src/Tgstation.Server.Host/Models/ReattachInformationBase.cs
index 3d3d4411cb..fc6d07a8f3 100644
--- a/src/Tgstation.Server.Host/Models/ReattachInformationBase.cs
+++ b/src/Tgstation.Server.Host/Models/ReattachInformationBase.cs
@@ -49,19 +49,30 @@ namespace Tgstation.Server.Host.Models
 		/// <summary>
 		/// Initializes a new instance of the <see cref="ReattachInformationBase"/> class.
 		/// </summary>
+		/// <remarks>For use by EFCore only.</remarks>
 		protected ReattachInformationBase()
 		{
 		}
 
+		/// <summary>
+		/// Initializes a new instance of the <see cref="ReattachInformationBase"/> class.
+		/// </summary>
+		/// <param name="accessIdentifier">The access identifier for the <see cref="DMApiParameters"/>.</param>
+		protected ReattachInformationBase(string accessIdentifier)
+			: base(accessIdentifier)
+		{
+		}
+
 		/// <summary>
 		/// Initializes a new instance of the <see cref="ReattachInformationBase"/> class.
 		/// </summary>
 		/// <param name="copy">The <see cref="ReattachInformationBase"/> to copy values from.</param>
 		protected ReattachInformationBase(ReattachInformationBase copy)
+			: base(copy == null
+				? throw new ArgumentNullException(nameof(copy))
+				: copy.AccessIdentifier)
 		{
-			ArgumentNullException.ThrowIfNull(copy);
 			Id = copy.Id;
-			AccessIdentifier = copy.AccessIdentifier;
 			Port = copy.Port;
 			TopicPort = copy.TopicPort;
 			ProcessId = copy.ProcessId;
diff --git a/tests/Tgstation.Server.Tests/Live/Instance/TestBridgeHandler.cs b/tests/Tgstation.Server.Tests/Live/Instance/TestBridgeHandler.cs
index 4276067b19..e00421e295 100644
--- a/tests/Tgstation.Server.Tests/Live/Instance/TestBridgeHandler.cs
+++ b/tests/Tgstation.Server.Tests/Live/Instance/TestBridgeHandler.cs
@@ -15,17 +15,20 @@ namespace Tgstation.Server.Tests.Live.Instance
 {
 	sealed class TestBridgeHandler : Chunker, IBridgeHandler
 	{
-		class DMApiParametersImpl : DMApiParameters { }
+		class DMApiParametersImpl : DMApiParameters
+		{
+			public DMApiParametersImpl(string accessIdentifier)
+				: base(accessIdentifier)
+			{
+			}
+		}
 
 		class BridgeResponseHack : BridgeResponse
 		{
 			public string IntegrationHack { get; set; }
 		}
 
-		public DMApiParameters DMApiParameters => new DMApiParametersImpl
-		{
-			AccessIdentifier = accessIdentifier
-		};
+		public DMApiParameters DMApiParameters => new DMApiParametersImpl(accessIdentifier);
 
 		long lastBridgeRequestSize = 0;