Do timeseries Series ID need to be unique?

I see in the UI of a timeseries sync that “A series can only be written by a single sync” but I see in the documentation that “qualified ID” exist, which include the timeseries sync RID, hence making it unique per sync.

Do timeseries sync need to be unique across timeseries sync ?

By default series IDs must be unique across time series syncs!

Qualified series IDs are necessary when backing a time series property by more than one time series sync. Backing a time series property with multiple time series syncs is a beta feature. Contact Palantir Support if you are interested in using this capability.

Hi Vincent,
I wanted to let you know that backing time series properties with multiple time series syncs is no longer a beta feature. You can learn more about generating qualified series IDs here. By default, series IDs still must be unique across time series syncs.