Removing cable after copypaste removes all

hi all,

gamma 6.7
when i copy paste and use MMB to remove a link, all links get removed. but this just happens after copy paste, if I select the same nodes with cables, then use MMB to remove one just the one gets removed.

cables

ah ok I see, after copy paste all links are also selected, which does not happen when I select them manually.

Press Shift while selecting to also select the links.