How to stop AE from adding numbers to layer names when duplicating or copying

[defaultasu2hz8ghkog]

I want to keep layers clean without numbers, is it possible?

[Mylenium]

Check the relevant preferences. You may also want to read up on how to rename items in AE.

Mylenium

[Meng Zhiqun]

Without the automatic numbering while duplicating layers, there's a chance that expressions, if targeting layer names, will pick up the wrong layer. If not numbering, how do u wish to differentiate your layers?