Runtime Error - Invalid conversion from runtime type Map<Id,SObject> to Map<Id,Opportunity>

[maniscoursera]

Getting the error at the below line of code -

Code:
Map<Id, Opportunity> oldOppMap = (Map<Id, Opportunity>)args.oldRecordsMap;

Error:
rflib_TriggerManager|run: Handler "OpportunityTriggerHandler" threw an exception with message "Invalid conversion from runtime type Map<Id,SObject> to Map<Id,Opportunity>". Stacktrace:

[maniscoursera]

Was able to use the oldmap using below code snippet -

Map<Id, sObject> oldOppMap = (Map<Id, sObject>)args.oldRecordsMap;

inside iteration getting the old values as-
Opportunity oppOld = (Opportunity)oldOppMap.get(opp.Id);