Time : 15:12:40 SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'total_salary' cannot be null Raw SQL : INSERT INTO rt_invoices (invoice_date,booking_id,customer_id,invoice_for,total_days,total_salary,days_present,prorata_salary,advance_amount,misc_charges,net_amount,remarks,payment_id) VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?) Time : 15:02:57 SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'total_salary' cannot be null Raw SQL : INSERT INTO rt_invoices (invoice_date,booking_id,customer_id,invoice_for,total_days,total_salary,days_present,prorata_salary,advance_amount,misc_charges,net_amount,remarks,payment_id) VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?) Time : 15:00:59 SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'total_salary' cannot be null Raw SQL : INSERT INTO rt_invoices (invoice_date,booking_id,customer_id,invoice_for,total_days,total_salary,days_present,prorata_salary,advance_amount,misc_charges,net_amount,remarks,payment_id) VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?)