My guess is that you have a system/user filter defined that references this attribute but it was not included in the referential integrity checks when you deleted the attribute. Was the attribute you deleted in fact have a named property of "_Canal" in Business Object Designer (ie "usr_canal" in the database) and was a related attribute.
I would suggest you log a case with Ivanti support and they can perhaps create a SQL script for you to remove the offending filter or its criteria so you can logon again.
Thank You for taking the attention and answer. I have already decided this problem.
I had to artificially insert records into the system tables md_database_column and md_attribute_type, but if I try to delete an attribute, the error appears again. The environment is a test, so not terrible. The main thing is that I can login.