Patching Error while using MO2

[Reidsmith32]

Hi, I was using synthesis in MO2, after patching the synthesis patcher showed the following error:

System.IO.IOException: The process cannot access the file 'D:\software\steam\steamapps\common\Skyrim Special Edition\Data\Synthesis.esp' because it is being used by another process.
at System.IO.FileSystem.CopyFile(String sourceFullPath, String destFullPath, Boolean overwrite)
at System.IO.FileInfo.CopyTo(String destFileName, Boolean overwrite)
at System.IO.Abstractions.FileInfoWrapper.CopyTo(String destFileName, Boolean overwrite)
at Noggog.IFileSystemExt.DeepCopy(IDirectory system, DirectoryPath from, DirectoryPath to, Boolean overwrite) in D:\a\CSharpExt\CSharpExt\Noggog.CSharpExt\Extensions\IFileSystemExt.cs:line 165
at Synthesis.Bethesda.Execution.Running.Runner.MoveFinalResults.Move(FilePath finalPatch, DirectoryPath outputPath) in D:\a\Synthesis\Synthesis\Synthesis.Bethesda.Execution\Running\Runner\MoveFinalResults.cs:line 50
at Synthesis.Bethesda.Execution.Running.Runner.RunAGroup.Run(IGroupRun groupRun, CancellationToken cancellation, DirectoryPath outputDir, RunParameters runParameters, Nullable1 sourcePath) in D:\a\Synthesis\Synthesis\Synthesis.Bethesda.Execution\Running\Runner\RunAGroup.cs:line 68 at Synthesis.Bethesda.Execution.Running.Runner.RunAllGroups.Run(IGroupRun[] groups, CancellationToken cancellation, DirectoryPath outputDir, RunParameters runParameters, Nullable1 sourcePath) in D:\a\Synthesis\Synthesis\Synthesis.Bethesda.Execution\Running\Runner\RunAllGroups.cs:line 36
at Synthesis.Bethesda.Execution.Running.Runner.ExecuteRun.Run(IGroupRun[] groups, CancellationToken cancellation, DirectoryPath outputDir, RunParameters runParameters, Nullable1 sourcePath) in D:\a\Synthesis\Synthesis\Synthesis.Bethesda.Execution\Running\Runner\ExecuteRun.cs:line 54 at Synthesis.Bethesda.GUI.Services.Profile.Running.ExecuteGuiRun.Run(IEnumerable1 groupRuns, PersistenceMode persistenceMode, Boolean localize, Boolean utf8InEmbeddedStrings, Language targetLanguage, CancellationToken cancel) in D:\a\Synthesis\Synthesis\Synthesis.Bethesda.GUI\Services\Profile\Running\ExecuteGuiRun.cs:line 47
at Synthesis.Bethesda.GUI.ViewModels.Profiles.Running.RunVm.b__39_1(Unit _) in D:\a\Synthesis\Synthesis\Synthesis.Bethesda.GUI\ViewModels\Profiles\Running\RunVm.cs:line 209

Any advices would be much appreciated, thanks!