ID:18754 There are multiple <sdc_or_tcl> files with the name "<filename>" with differing content in the design. Change your design so that all <sdc_or_tcl> files with the same filename have the same content.

CAUSE: There are multiple SDC files with one name with differing content in the design.

ACTION: Change your design so that all SDC files with the same filename have the same content.