Looks like we finally have a solution.

Change logging to just log a message, instead of the exception.
Moved logic to Syncer involvement.  When posting the data, if a 500 is
returned, then it is up to the Syncer to re-submit it.

FreeTubeSync/Model/BaseModel.cs

@@ -0,0 +1,17 @@
+using System.Collections;
+
+namespace FreeTubeSync.Model;
+
+public class BaseModel
+{
+    public void UpdateFrom(object other)
+    {
+        foreach (var prop in other.GetType().GetProperties())
+        {
+            if (prop.Name == "_id" || prop.Name == "id" || prop.Name == "Id" || prop.Name == "subscriptions" || prop.Name == "videos")
+                continue;
+            var val = prop.GetValue(other);
+            prop.SetValue(this, val);
+        }
+    }
+}

FreeTubeSync/Model/ChangeLog.cs

@@ -1,6 +1,6 @@
 namespace FreeTubeSync.Model;
 
-public class ChangeLog
+public class ChangeLog : BaseModel
 {
     public int Id { get; set; }
     public string TableName { get; set; } = string.Empty;

FreeTubeSync/Model/History.cs

@@ -2,7 +2,7 @@ using System.ComponentModel.DataAnnotations;
 
 namespace FreeTubeSync.Model;
 
-public class History
+public class History : BaseModel
 {
     [Key]
     public string _id { get; set; } = string.Empty;

FreeTubeSync/Model/Playlist.cs

@@ -2,7 +2,7 @@ using System.ComponentModel.DataAnnotations;
 
 namespace FreeTubeSync.Model;
 
-public class Playlist
+public class Playlist : BaseModel
 {
     [Key]
     public string _id { get; set; } = string.Empty;

FreeTubeSync/Model/Profile.cs

@@ -2,7 +2,7 @@ using System.ComponentModel.DataAnnotations;
 
 namespace FreeTubeSync.Model;
 
-public class Profile
+public class Profile : BaseModel
 {
     [Key]
     public string _id { get; set; } = string.Empty;

FreeTubeSync/Model/SearchHistory.cs

@@ -2,7 +2,7 @@ using System.ComponentModel.DataAnnotations;
 
 namespace FreeTubeSync.Model;
 
-public class SearchHistory
+public class SearchHistory : BaseModel
 {
     [Key]
     public string _id { get; set; } = string.Empty;

FreeTubeSync/Model/Setting.cs

@@ -2,7 +2,7 @@ using System.ComponentModel.DataAnnotations;
 
 namespace FreeTubeSync.Model;
 
-public class Setting
+public class Setting : BaseModel
 {
     [Key]
     public string _id { get; set; }

FreeTubeSync/Model/Subscription.cs

@@ -3,7 +3,7 @@ using Microsoft.EntityFrameworkCore;
 namespace FreeTubeSync.Model;
 
 [Owned]
-public class Subscription
+public class Subscription : BaseModel
 {
     public string id { get; set; } = string.Empty;
     public string name { get; set; } = string.Empty;

FreeTubeSync/Model/Video.cs

@@ -3,7 +3,7 @@ using Microsoft.EntityFrameworkCore;
 namespace FreeTubeSync.Model;
 
 [Owned]
-public class Video
+public class Video : BaseModel
 {
     public string videoId { get; set; } = string.Empty;
     public string title { get; set; } = string.Empty;