Dataverse table schema changed, Power BI remains on old schema, nothing helps

I started using a Dataverse-in-Teams-Table some time ago for a Power BI report. Recently, I changed the table schema: I added new columns, and removed some columns. Now I am trying to build a new report using the schema. For the columns removed, I get this error message:

I could "fix" this problem by extending the query and manually remove columns that do not exist anymore, but this approach leads to problems after restarting Power BI:

let
Source = CommonDataService.Database("orga5348445.crm17.dynamics.com"),
dbo_crac4_bedanalyse = Source{[Schema="dbo",Item="crac4_bedanalyse"]}[Data],
#"remove" = Table.RemoveColumns(dbo_crac4_bedanalyse, {"crac4_bedurfnisbeschreibung","crac4_checkcoach","crac4_checkcoachname","crac4_checkgs","crac4_checkgsname"})
in
remove

Now two questions:

• How to properly adapt to the new schema (than removing columns manually one by one)?
• How to bring in the columns newly added to Dataverse?

What I tried, without success:

• publish Dataverse table (using the PowerApps frontend that I called from PowerApps in Teams)
• In Power BI: close and reopen connection
• In Power BI: empty data cache
• restart Power BI, PC
• Using transform data instead of get data
• Using direct query

Many thanks for your help! I was searching for possible solutions for hours, but nothing really helped. It seems really weird to me that Power BI comes up with an old schema that has been changed long ago, and that just doesn't want to vanish. 
Chris