Helping out a friend in a situation.

Let say, Friend A worked at Group HQ for 10 years, then requested for transfer to Subsidiary A for better job exposure.

Friend A has a different job experience, the role at Subsidiary A requires more extensive job exposure.

No issue until 10 months later, suddenly staffs of Friend A, lodge in complain to HR about his working mistakes. Firstly lodging to HR is only for misconduct issues.

Then Friend A, sense a PIP coming, quickly requested to transfer back to Group HQ.

Secondly Friend A is an employee of Group HQ, not an official employee of Subsidiary A: Friend A is merely a secondee (as Friend A punya employment contract is under Group HQ), Also have special org chart signed - show Friend A reports to both Group HQ boss & Subsidiary A boss.

No official transfer, just email from representatives of Group HQ to transfer back. Friend A transfers and physically work at Group HQ.

Suddenly Boss of Subsidiary A, want Friend A to be imposed PIP. Group HQ decided to implement new PIP on new work role. Friend A refuses to go back to Subsidiary A, as a PIP there would be suicidal, as only 10 months Friend A has not fully mastered the role.

Question:

1) Since Friend A already started new role at Group HQ, can they impose a new PIP based on new role?

2) They should PIP based on old role, right?

3) Can they force Friend A to transfer back to Subsidiary A? Friend A told me, Friend A die die won't go back to Subsidiary A, because it is suicidal. Want to refuge at Group HQ.