Speaker tag across rttm files

[Kirankumar2609]

Should all the rttm files have unique speaker tags?

For eg., If there are three audio files and all of them have two different speakers(within files and across files too). Can the tags be made like (Speaker_00, Speaker_01) for all these three files or should it be (Speaker_00, Speaker_01) for first file, (Speaker_02, Speaker_03) for second file and (Speaker_04, Speaker_05) for third file?