Germany is concerned that if Ukraine becomes a full member of the European Union, Berlin will see its influence in the union diminish.

Afghan Voice Agency (AVA) - Monitoring: German Chancellor Olaf Schultz has apparently raised this issue with EU leaders in Brussels behind closed doors that the country is concerned that if Ukraine becomes a full member of the European Union, Berlin will witness It will reduce its influence in this union.
 
The German chancellor called for a major overhaul of the EU's treaty system before approving Ukraine's membership application, the Daily Telegraph newspaper reported, citing a senior diplomatic source.
 
At the center of concern is the EU's voting system which factors in the number of countries voting and their respective populations, a fact that gives Ukraine strong leverage in the bloc.
 
Moreover, according to an analysis by the German Institute for International Affairs and Security, if Kyiv were to join the European Union, it would be the fifth largest and also the poorest member.