Keywords refused on product's file - prs1.6.1.24

[pascuald]

Hello ,

I am working with prs 1.6.1.24 and i just can't add any keyword on product's file. 

There is one keyword 'Travaux' that i can't delete.
if i put any other keyword ( in addition to Travaux or after deleting Travaux ) it write it but do not validate it and it is return of the previous keyword (Travaux )

Anyone with an explanation and a solution ?

Is there any other solution (through database ?) to modify and/or fix the problem ?

Thanks a lot

Pascual

Edited April 23, 2020 by pascuald (see edit history)