Hi Irfraz, The issue with the Attachments is caused by a Custom Trigger on your datanase. I have placed a script below that will delete this trigger for you.
SCRIPT 1 - Drop Custom Trigger before upgrading the database
IF EXISTS (SELECT * FROM sys.triggers WHERE object_id = OBJECT_ID(N'LT_HR_LeaveNRoster_TRG')) BEGIN DROP TRIGGER LT_HR_LeaveNRoster_TRG END
SCRIPT 2 - Delete Duplicate users before running the upgrade. Please confirm this with PAFCO before applying this script
DELETE FROM LT_SYS_UserCompany WHERE UserName IN ('6012') AND EmployeeID IN ('6999','9023') DELETE FROM LT_SYS_UserCompany WHERE UserName IN ('6014') AND EmployeeID ='' DELETE FROM LT_SYS_UserCompany WHERE UserName IN ('9021') AND EmployeeID = '' DELETE FROM LT_SYS_UserCompany WHERE UserName IN ('9030') AND EmployeeID = '' DELETE FROM LT_SYS_UserCompany WHERE UserName IN ('admin') AND EmployeeID = 'admin' DELETE FROM LT_SYS_UserCompany WHERE UserName IN ('Manager') AND EmployeeID = 'Manager' DELETE FROM LT_SYS_UserCompany WHERE UserName IN ('Manager') AND Enabled = 0 See screenshot below. Let me know if you need further assistance. Figure 1 - Upgrade from V9 to 15.2 resolving the "Duplicate User" issue

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