Help me please! UR12 Keyboard into two channels

Hello. I’m new in the forum and I’m new in the recording world.
I bought my UR12 thinking that I was going to be able to record in stereo with my keyboard, but I realized that I needed the two channels of the interface to do that (My keyboard has L/Mono - R outputs)
I decided to bought a non balanced cable 1/4 to XLR to conect the L/Mono output of the keyboard to the MIC input of the UR12 and a normal 1/4 cable to conect the R output to the line input of the interface. It works great but my question is if I can damage the interface doing that.
Thank you.