[Backport 2.x] Bug 5861 Fix: fix import api always display overwritten after importing saved objects, after this fix, the first time import will display new and after that will display overwritten if import the same objects

[Backport 2.x] Bug 5861 Fix: fix import api always display overwritten after importing saved objects, after this fix, the first time import will display new and after that will display overwritten if import the same objects #7708