Modified the delete function and query for the delete button, for adding the is_deleted fields, this is for when deleting the tickets, the tickets will not be deleted in the database but will be tagged as deleted only. Added is_deleted fields in the project table. Tested the changes, and as per testing, it is now OK, checked the data in the database, and as per checking, the data is tagged as deleted. I checked other delete buttons for checking the delete functions, and as per checking, all are using is_deleted fields.