Cannot sync same library to two server

I have two seafile servers, better I had, the second one was test. Now the first one lost the sync to the lib1 because i synced it to server2. now i cant sync the lib to server 1:
library is in use…using latest pro server and client 7.0.6 on ubuntu

the second install was just a test install thats gone, the problem is the client mixes up tha allocation of the local sync dir