Queries :: Updating Table From A Query?

I have a table and a query both of which have the same [Resource ID], [Resource Name] fields.

I am trying to update the [CBL_1_Date], and the [CBL_1_kW] fields in the table with the [CBL_x_Date] and [CBL_x_kW] fields of the query. The problem is that when I try to run the query I keep getting "Operation Must Use and Updateable Query" error.

here is the SQL Code

UPDATE tCBLAggregation
INNER JOIN qBestof4CBLs_avg
ON (tCBLAggregation.[Event Date] = qBestof4CBLs_avg.[Event Start Date]) AND (tCBLAggregation.[Resource ID] = qBestof4CBLs_avg.[Resource ID])
SET tCBLAggregation.CBL_1_Date = [qBestof4CBLs_avg].[CBL_x_Date], tCBLAggregation.CBL_1_kW = [qBestof4CBLs_avg].[AvgOfCBL_x_kW];