Error message when update execution comment with more than 255 characters

[yanisst]

In the last years I use version difido-server v2.2.05 and didn't see any limit when I update the execution comment
I install the new version 3.1.01 and I notice when I try to insert some info (several rows of description) at execution description/comment pop up error message "Error updating execution #xx"

I found that with more than 255 characters in the execution comment window pop up this error