Smart ticket error - a category or taxonomy already exisit

Hi expert,

SM9.63

I'm trying to implement smart ticketing, when I train the category I keep getting the failed training and in the logs I get the following error. Can some one advice where is this category or taxonomy created?

<Error><errorid>CLASSSERVERCATEGORYCREATE-2147438335</errorid>
<rawerrorid>0x8000B101</rawerrorid>
<errorstring>ERROR</errorstring>
<errordescription>A category or taxonomy with that name already exists.</errordescirption>.

I had tried the following yet some error keep showing in logs

Delete all smart ticket task n recreate,

Restart sm service 

Restart smart analytics services

Regards

WC we