Canceling an accounting entry with minus

Question

Some accountants
like to use the convention that when canceling an entry they use
minus the amount they would like to cancel. Example;

Expenses	Dr. -
100		“to cancel entry from before”
Payables 		Cr. - 100
“to cancel entry from before”

In Odoo the
following constraint is in AML;
CONSTRAINT
account_move_line_credit_debit2 CHECK ((credit + debit) >=
0::numeric)

Is there any
particular reason why this constraint exists for the above balanced
entry and would it cause any unforeseen effe

Alexander · Answer

Thanks Mahmoud that is fine and in order, but to clarify the question ... why is it not possible to cancel an entry in this manner as it is quite common to do so in other systems, and what possible negative or unforeseen consequences would it have to remove the constraint that checks for this?

Mahmoud Abdelwahid · Answer

You can't create Dr. or Cr. with minus value , If you want to cancel entry you can create new Entry and reverse credit and debit values.
EXample
Expenses Cr.  100 “to cancel entry from before”
Payables Dr.  100 “to cancel entry from before”

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