Definition name is already in use. Saving this...

# C.2.32 Definition name is already in use. Saving this...

The definition you're attempting to create uses the same name as an existing definition. Saving the definition with the same name will cause XTrackCAD to replace the existing definition, making the existing definition inaccessible. If the previous definition must be preserved, then choose a different name for the new definition. If necessary, the Custom Management dialog can be used to change definition names.

Refer to section 2.9.2 for detail.