Zend certified PHP/Magento developer

Where to delete attribute values – Magento 2.4.6

We have an issue where we get data from a client. They are copying and pasting from websites so things are a mess atm.

So we have attributes with sku values in them. I did try and delete them manually but Magneto admin just crashes and the values i have deleted comes back.

is there away to find these values in the DB?

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Edit:
I get this error when i try and delete the values that is not supposed to be there.
SQLSTATE[HY000]: General error: 1205 Lock wait timeout exceeded; try restarting transaction, query was: DELETE FROM eav_attribute_label WHERE (attribute_id =’83’)