Dublicated bookmarks

i need some help please

since round about 2 weeks i get duplicated bookmarks (some folders 3 times)

i am using nc 18.0.7 with floccus 4.2.6 on many clients firefox and chromium all linux based.

is there any way to clean them up, find and eliminate the duplicates?

i dont know where they are come from and i cant see wich client they come from