Whenever a charge is altered or added to by the court after the trial has commenced:

When a charge is altered or added after the trial has begun, section 217 of the CrPC allows both the prosecutor and the accused to recall or re-summon and examine any witness already examined about the alteration, unless the court records reasons that the request is for vexation, delay or defeating justice. So "the prosecution has a right to recall or re-summon any witness who has already been examined" is correct, while the statements denying that right to the accused or barring the prosecution from calling witnesses are wrong.

Current law: BNSS section 240 retains both parties' entitlement and the recorded-reasons exception.