Dashboard - Datasources changed on existing panels when changing default datasource

I am new to grafana and created a dashboard with datasource influxx
after that I created another dahsboard with graphql as datasource.

I changed default datasource from influx to graphgl.

Strangewise all datasources from existing dashboard with only influx datasource panel change the panles datasouce to graphql.

What am I missing?

thanks T

PS. somehow in a certain stop, checked old versions - datasources where reset to null for all panels.

Hi @riker1,

Can you send a screenshot of what happened, and what you expected to happen? I think that would help us understand your issue.