"'ABC-Sub' is not defined as a Subscriber for 'XYZ-Pub'" Error when dropping a MERGE replication subscriber

Hello,

I am getting the following error:

Msg 20032, Level 16, State 1, Procedure sp_MSdrop_merge_subscription, Line 72 [Batch Start Line 2]

'ABC-Sub' is not defined as a Subscriber for 'XYZ-Pub'.

Msg 14056, Level 16, State 1, Procedure sp_dropmergesubscription, Line 482 [Batch Start Line 2]

The subscription could not be dropped at this time.

EXECsp_dropmergesubscription

  @publication='Mrg_Repl',

  @subscriber ='ABC-Sub',

 @subscriber_db ='Sub-DB';

although when I run:

USE XYZ-Pub

Go
sp_helpmergesubscription

I get:

Help please :(