User profile link - strange query parameter "wr"

[Viktor Levytskyi]

Hello, 

Each post inside the topic contains a link to the user profile with the strange query parameter "wr". The same situation with picture comments inside albums.

Example:

mydomain.com/profile/13967-ajna/?wr=eyJhcHAiOiJmb3J1bXMiLCJtb2R1bGUiOiJmb3J1bXMtY29tbWVudCIsImlkXzEiOjkxOTksImlkXzIiOjE4MTU2NH0= 

This prefix is visible only for administrator. Guests and Members do not see this parameter. What is it? Is it possible to remove this parameter?

P.S. My forum was recently migrated from VBulletin 4.

[Adriano Faria]

This is for the warning system. 

[Ryan Ashbrook]

1 hour ago, Adriano Faria said:

This is for the warning system. 

Correct - it's a warning reference. It contains data pertaining to the last item you were viewing to store with the warning if you issue one.