System.OverflowException: Value was either too large or too small for an Int32

[nils-a]

Ghostly version
1.15.0

Windows 10 version
19042.1110

Describe the bug
Seemingly ghostly stopped syncing.
The Log shows System.OverflowException: Value was either too large or too small for an Int32

Stack Trace

System.OverflowException: Value was either too large or too small for an Int32.
   at System.Number.ThrowOverflowOrFormatException(Boolean, String) + 0x63
   at System.Number.ParseInt32(ReadOnlySpan`1, NumberStyles, NumberFormatInfo) + 0x11f
   at System.Int32.Parse(String, IFormatProvider) + 0x49
   at Ghostly.GitHub.Legacy.GitHubNotificationItemMapper.Map(Notification) + 0x40
   at Ghostly.GitHub.Legacy.Synchronizers.NotificationSynchronizer.<Synchronize>d__11.MoveNext() + 0x7ee
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() + 0x21
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task) + 0x70
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task) + 0x38
   at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task) + 0x17
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() + 0x10
   at Ghostly.GitHub.Legacy.GitHubSynchronizer.<Synchronize>d__8.MoveNext() + 0x9e
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() + 0x21
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task) + 0x70
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task) + 0x38
   at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task) + 0x17
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() + 0x10
   at Ghostly.GitHub.Legacy.GitHubVendor.<Synchronize>d__16.MoveNext() + 0x93
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() + 0x21
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task) + 0x70
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task) + 0x38
   at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task) + 0x17
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() + 0x10
   at Ghostly.Features.Synchronization.DownSyncHandler.<Synchronize>d__6.MoveNext() + 0x109
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() + 0x21
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task) + 0x70
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task) + 0x38
   at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task) + 0x17
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() + 0x10
   at Ghostly.Features.Synchronization.DownSyncHandler.<Handle>d__5.MoveNext() + 0x158
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() + 0x21
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task) + 0x70
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task) + 0x38
   at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task) + 0x17
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult() + 0xb
   at Ghostly.Features.GhostlyRequestHandler`1.<MediatR-IRequestHandler<T,MediatR-Unit>-Handle>d__0.MoveNext() + 0xb4
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() + 0x21
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task) + 0x70
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task) + 0x38
   at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task) + 0x17
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() + 0x10
   at Ghostly.MediatorExtensions.<PerformDownSync>d__4.MoveNext() + 0x10d
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() + 0x21
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task) + 0x70
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task) + 0x38
   at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task) + 0x17
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult() + 0xb
   at Ghostly.Services.SynchronizationService.<PerformSynchronization>d__34.MoveNext() + 0x465

Expected behavior
Sync is working.