primary keys columns in criteria is not matching the number of primary keys columns

[sojan1]

Dotmim.Sync.SyncException: '[InternalApplyChangesAsync]..[InternalApplyChangesAsync]..[InternalApplyTableChangesAsync]..Specified argument was out of the range of valid values. (Parameter 'Can't make a query on primary keys since number of primary keys columns in criteria is not matching the number of primary keys columns in this table')'

Dotmim.Sync.SyncException
Message=[InternalApplyChangesAsync]..[InternalApplyChangesAsync]..[InternalApplyTableChangesAsync]..Specified argument was out of the range of valid values. (Parameter 'Can't make a query on primary keys since number of primary keys columns in criteria is not matching the number of primary keys columns in this table')
Source=Dotmim.Sync.Core
StackTrace:
at Dotmim.Sync.LocalOrchestrator.<>c__DisplayClass0_0.<b__3>d.MoveNext()
--- End of stack trace from previous location ---
at Dotmim.Sync.LocalOrchestrator.<>c__DisplayClass0_0.<b__3>d.MoveNext()
--- End of stack trace from previous location ---
at Dotmim.Sync.SyncPolicy.d__171[[System.ValueTuple3[[Dotmim.Sync.SyncContext, Dotmim.Sync.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[Dotmim.Sync.ClientSyncChanges, Dotmim.Sync.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[Dotmim.Sync.ScopeInfoClient, Dotmim.Sync.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].MoveNext()
at Dotmim.Sync.LocalOrchestrator.InternalApplyChangesAsync(ScopeInfo cScopeInfo, ScopeInfoClient cScopeInfoClient, SyncContext context, ServerSyncChanges serverSyncChanges, ClientSyncChanges clientSyncChanges, ConflictResolutionPolicy policy, Boolean snapshotApplied, DbConnection connection, DbTransaction transaction, CancellationToken cancellationToken, IProgress1 progress) at Dotmim.Sync.SyncAgent.SynchronizeAsync(String scopeName, SyncSetup setup, SyncType syncType, SyncParameters parameters, CancellationToken cancellationToken, IProgress1 progress)
at MauiAppClient.ViewModels.SyncViewModel.ExecuteTestCustomActionCommand() in C:\Users\sojan.GEROC\Documents\Projects\Dotmim.Sync-master\Samples\MAUI\MauiAppClient\ViewModels\SyncViewModel.cs:line 174
at System.Threading.Tasks.Task.<>c.b__128_0(Object state)
at Android.App.SyncContext.<>c__DisplayClass2_0.b__0() in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Android.App/SyncContext.cs:line 36
at Java.Lang.Thread.RunnableImplementor.Run() in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Java.Lang/Thread.cs:line 36
at Java.Lang.IRunnableInvoker.n_Run(IntPtr jnienv, IntPtr native__this) in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/obj/Release/net6.0/android-31/mcw/Java.Lang.IRunnable.cs:line 84
at Android.Runtime.JNINativeWrapper.Wrap_JniMarshal_PP_V(_JniMarshal_PP_V callback, IntPtr jnienv, IntPtr klazz) in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Android.Runtime/JNINativeWrapper.g.cs:line 22

[sojan1]

even though the error says it was related to the primary key, it was not primary key
it happening because of a 'NOT NULL' column in 3 tables.

mistake was this, I removed the XML fields when provisioning. but the fields were 'NOT NULL fields'
when synchronising, all other columns without this field will not allow insertion into the table as the field is a ''NOT NULL' field.