Commiting is not possible due to existing temporary files

Hi, one many projects i get the following error message in sourcetree on commit:

git -c diff.mnemonicprefix=false -c core.quotepath=false -c credential.helper=sourcetree commit -q -F /var/folders/_b/f54h3fdj2tl60yymlgb3zly00000gn/T/SourceTreeTemp.rEaW6x
error: unable to create temporary file: File exists
error: Error building trees
Completed with errors, see above

If i commit the changes e.g in PHPStorm, I'm afterwards able to push the change to the remote endpoint.

Please fix this. I also had this problem with one version before.