ExpressionChangedAfterItHasBeenCheckedError: Expression has changed after it was checked. Previous value: 'true'. Current value: 'false'

Thiserrorhappenswhenacallofaneventonblur()ismadeinthecomponent.ts:

• Errorprocedure:

Whenperformingarecord,insertingdatainthefirstCODEfield,withonly1digit,itaccessesaOnBlur()event,whichverifiesthatthesamecodeenteredisgreaterthan0,withtheexpressioninTs:resultado.total>0,ifso,itdisplaysamessagesayingthatthecodealreadyexistsandyouwanttochangeit.Atthispointitpresentstheerrorintheconsole.Couldsomeonetellmehowtofixthiserror.

Thecomponenttemplatelookslikethis: