Kaltura referenceid Error

Is it possible into Kaltura referenceId length <2, while I am passing referenceId length <2 its showing error like this

"KalturaMediaEntry::referenceId" must have a min length of 2 characters

referenceId is limited to 2 characters.

See:

• For insert: https://github.com/kaltura/server/blob/Naos-14.3.0/api_v3/lib/types/entry/KalturaBaseEntry.php#L541
• For update: https://github.com/kaltura/server/blob/Naos-14.3.0/api_v3/lib/types/entry/KalturaBaseEntry.php#L696

You can append a constant character to your Reference Ids (like _) when you insert or update and remove it when you need to do the look up in your own system.