This backend version is not supported to design database diagrams or tables. (MS Visual Database Tools)

From previous I try to change table field size in SQL Server Management Studio I got this message appear and can't change anything with my table so I realize I use Server Management 2008R2 but my Database version is 2012 for now so I change Server Management to use version 2012 and it work fine. to avoid this don't use old version to edit new version that's all.

Increase Mantis bug tracker summary field length.

Mantis bug tracker is good but with limit summary filed is not good for me. I need to expand from 128 character to 255 for can fill in more summary for me.

we have 3 place to change.
1. in Database open and go to "mantis_bug_table" in field "summary" expand from varchar(128) to varchar(255)
2. in  source page "bug_report_page.php" and "bug_update_advanced_page.php" go to
line contain
type="text" name="summary" size="105" maxlength="128"
and change it to
type="text" name="summary" size="105" maxlength="255"
u have to change this line in both files.

all done can test and enjoy with more summary field
hint : Current version i used is 1.2.15 and with Ms SQL 2012
then
"bug_report_page.php" change in line 475
and
"bug_update_advanced_page.php" change in line 577