While Merging SVN version to Before Migrate Git version it was showing the Error
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LibGit2Sharp.LibGit2SharpException: mainline branch is not specified but 9902a32916513a5bcd05b59d602489af60c64372 is a merge commit at LibGit2Sharp.Core.Ensure.HandleError(Int32 result) in /_/LibGit2Sharp/Core/Ensure.cs:line 154 at LibGit2Sharp.Core.Proxy.git_cherrypick(RepositoryHandle repo, ObjectId commit, GitCherryPickOptions options) in /_/LibGit2Sharp/Core/Proxy.cs:line 248 at LibGit2Sharp.Repository.CherryPick(Commit commit, Signature committer, CherryPickOptions options) in /_/LibGit2Sharp/Repository.cs:line 1461 at LibGit2Sharp.RepositoryExtensions.CherryPick(IRepository repository, Commit commit, Signature committer) in /_/LibGit2Sharp/RepositoryExtensions.cs:line 420 at Mendix.Modeler.VersionControl.Operations.Git.GitPortFixOperation.<>c__DisplayClass5_1.<Execute>b__0() in Mendix.Modeler.VersionControl\Operations\Git\GitPortFixOperation.cs:line 60 at Mendix.Modeler.VersionControl.Actions.LibGit2BloblessActionWrapper.Wrap[TResult](String dir, Func`1 libGit2Action, Action cleanBeforeRetryAction) in Mendix.Modeler.VersionControl\Actions\Git\LibGit2BloblessActionWrapper.cs:line 58 at Mendix.Modeler.VersionControl.Operations.Git.GitPortFixOperation.Execute(PortFixRequest request) in Mendix.Modeler.VersionControl\Operations\Git\GitPortFixOperation.cs:line 60