Every 5 mins a Log is Send with the erro

[Server thread/ERROR] [ne.lt.ch.Changed/]: Null tag encountered while updating tag for PLAYER

Is not a Fatal Erro but is kinda anoying after some time

The server was with Changed mod 0.14 and with no players online btw

I had left this in to debug the Changed DFU, since I was getting null pointer exceptions. The log itself doesn't mean anything. At the time I thought having a null tag was an error state, but it doesn't seem that way.