Thread:CaseCracking100/@comment-1038387-20200221090854

Do not manually add the Deceased characters category. This category is built into the Death field of the template - with a one month delay. We did this after people complained they were getting spoiled by reading Special:WikiActivity. If you manually add the category, congratulations, you spoil people reading Special:WikiActivity.

This was explained to you in an edit summary when your edit was undone. You've been given a short block before for this, but apparetly it didn't help. Your new block is longer. 