yup a very fishy and dubious story.
The alleged womans father got a first and last name is hindu and she has another surname.
Also we need to remember that Indian media in general is the information propaganda weapon of the tyrannical Indian establishment they want to cause division and conflict between pakistani muslims and Sikhs because of the politically sensitive and closeness of the Khalistan issue so they pushing this story out when in fact it is a non-story.
If she is real person then its probably another case of honeytrap Indian Hindu R&AW agent posing as a sikh woman probably sent on a mission to scout on pakistan's infrastructure. Often Hindu Indian spies do this covert war by deception we seen this in the 1970s/80s both indian R&Aw and pakistani ISI spies were caught and killed or jailed for very long time in their enemies respective countries.
Oh, I see, sorry for the misunderstanding.
I think you are referring to the corrections to the actual Manglacharans themselves, right?
I don't know what agenda SGPC had, but technically, that general idea was also supported by scholars.
If you do Sehaj Paath or Akhand Paath, you will notice even in today's printed saroops that there is a general rule:
Full Mool Mantar Manglacharan when a new Raag starts.
Small Manglacharan when the Mehla or the Ghar changes.
If there was a Manglacharan, the Raag + Mahala would start with ਰਾਗੁ.
These are more noticable in early Puratan Birs.
It's really interesting when you get into this, but it's a really big grey area.
This also reminds me that there was once 3 Singhs who came up to Talwara Ji and claimed he was changing Gurbani. He requested that they come into a room with a Chalk board. After the end of the day, the Singhs left with no doubt in thier minds.
These were done by scholars with good intentions and good faith.
I'm just trying to show the other side of the argument, trying to explain the context behind it.