please I'm in great need of help.

I’m Korean. Unwanted guidelines have been formed. I want to get rid of the line.
Line is created when using the mirror function.
Please teach me how to remove the guidelines.
Please understand that it is not natural because I use a translator.

It could be a few different things. A screenshot would be helpful in determining what the actual issue is.

My guess: you have checked “show line” per accident. Uncheck it. Look for two triangles, see screenshot. Good luck!

Is wireframe on?