Duplicate entry for key 'PRIMARY' webERP version 4.15.2

[wissedenis22]

I guess everything starts from table systypes, and if column typeno is not updated correctly it'll let to duplicate entry for whatever key. 

When I installed/upgraded to version 4.15.2 most accounts couldn't be update, 

I took a look to the systypes tables and I found out that all typeno where updated back to 0 and  under SQL_CommonFunctions.inc

line 19

PHP Code:

$SQL = "UPDATE systypes SET typeno = typeno + 1 WHERE typeid = '" . $TransType . "'"; 


increments any primary ID of a give account ID (typename), however I don't get it why that when I ran the upgrade all my typeno was updated to back to 0, Hence facing Duplicate entry  for key 'PRIMARY' for almost everything