MyEclipse debugging pops up Ambiguous Source Files

In MyEclipse debugging (debug) mode, the Ambiguous Source Files warning pops up, as shown below

Ambiguous Source Files: Ambiguous source files

1. The reason for this prompt:

         There are files with the same name in the two projects of MyEclipse

2. Solution: Choose one of two solutions (the second one is recommended)

        ① Ignore it, a pop-up click "OK"

        ② closed temporarily less than the other projects