"Error: connect ETIMEDOUT" persist error after delete

Hi here !
I have a problem..
I've try to install node-red-node-mysql and configure it.
During my configuration I have "Error: connect ETIMEDOUT".
After Somes try I finally connect mysql to node red and it works correctly, but in my debug messages every 5-8s I have a new message "Error: connect ETIMEDOUT"
So I delete my node, delete my configuration node, unistall mysql plugin, delete my flow, refresh node red, but this message still continues on all my flow and every time i don't know how to stop it ! any idea ?
(sorry for my English)
Capture d’écran de 2021-03-01 16-51-11

First check in the menu Configuration Nodes and see if there are any unused, if so delete them and deploy.
If that doesn't fix it then use the search feature (Ctrl+F) and search for the node id that appears above each error, the nnnnn.nnnn id. I notice that you have two nodes doing it, one named DBms and the unnamed one.