More than one custom value accessor matches form control unspecified name attributes...

More than one custom value accessor matches form control unspecified name attributes NG_VALUE_ACCESSOR

I am created two directives for input fields one checkbox true or false instead of 0 or 1 . another directive option value I need number not string

Directive1 :
@Directive({selector: DI_1,
providers: [
{
provide: NG_VALUE_ACCESSOR,
useExisting: forwardRef(() => Directive1),
multi: true
}
]})


Directive2 :
@Directive({selector: DI_2,
providers: [
{ provide: NG_VALUE_ACCESSOR,
useExisting: forwardRef(() => Directive2),
multi: true
}
]})


if I am removing onthe providers. it is working fine.I need both directive How to resolve on angular

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