Linux: Samba: copying a file to a linux samba server that has an NFS mount attached fails with locked a portion of the file

spent a little to much time before I found the correct solution. Now someone should point me to the detailed description on what can go wrong with strict locking off ;))

https://www.jamescoyle.net/how-to/340-samba-the-process-cannot-access-the-file-because-another-process-has-locked-a-portion-of-the-file