duplicate parameters/variable names

Hello,

I am trying to simulate a FSI model in 2d-asymmetric however, COMSOL is giving me errors of duplicate parameter names. But these parameters seem to be coordinate/spatial variables. I am very confused.

This is the error message:

Duplicate parameter/variable name.
- Variable: r
- Variable: rTIME
- Variable: z
- Variable: zTIME
Error in multiphysics compilation.

Any help is appreciated!
Thank you!