SAP Security Parent role replacement with child role relationship

Dear Team ,

Could you please help me on :

Parent role replacement with child role

As per our SAP standard once delete the relationship with child role , cannot be added again

my question is

i have Parent role HZZ_004 ,HZZ_007

Child role HGL_004, HGL_007

The mapping has wrongly done HZZ_004-->HGL_007 and HZZ_007 -->HGL_004

now i need to maintain mapping with HZZ_004 with HGL_004

and HZZ_007 with HGL_007

Vice versa has to be maintained

Need suggestion and help