diff --git a/addons/account/models/account_move.py b/addons/account/models/account_move.py
index bce124dc9f30d71f3f20c11c1bdb20fd5785de3e..ef60c1897a7c4df9f432a9fb2c0fbeb25e7b43c1 100644
--- a/addons/account/models/account_move.py
+++ b/addons/account/models/account_move.py
@@ -421,7 +421,7 @@ class AccountMoveLine(models.Model):
         help="The move of this entry line.", index=True, required=True, auto_join=True)
     narration = fields.Text(related='move_id.narration', string='Narration')
     ref = fields.Char(related='move_id.ref', string='Reference', store=True, copy=False, index=True)
-    payment_id = fields.Many2one('account.payment', string="Originator Payment", help="Payment that created this entry")
+    payment_id = fields.Many2one('account.payment', string="Originator Payment", help="Payment that created this entry", copy=False)
     statement_line_id = fields.Many2one('account.bank.statement.line', index=True, string='Bank statement line reconciled with this entry', copy=False, readonly=True)
     statement_id = fields.Many2one('account.bank.statement', related='statement_line_id.statement_id', string='Statement', store=True,
         help="The bank statement used for bank reconciliation", index=True, copy=False)