Seafile Client 7.0.5 error in Ubuntu - File is locked by another application

I am using a selfhosted setup of this awesome service that is provided by Yunohost (it seems that the version in 7.0.5). But recently (firstly it started on a windows host, and now again on ubuntu linux) when I try to sync even the basic “My Library” the client in Ubuntu reports that the “File is locked by another application”. I will provide you with logs, that are needed.

What I am interested in is WHAT applications the file gets locked by and is the lock on the server on on the client system.

I have found the solution for this problem as proposed here.

It seems that the updates and reinstallations of the seafile in yunohost input extra lines that need to be remoevd.