DB Table Creator cannot be opened for configuration - Output type mappings are missing for columns

I have a DB Table Creator that is not configurable in my workflow.

I had it connected downstream from a joiner and it worked fine.

I changed the joiner to a Concatenate node and now I can’t follow that with a DB Table Creator.

Everything else in the flow is the same.

The error message lists three fields, all of which are Strings upstream.

The detailed error is:

“Output type mappings are missing for columns:

Call Start Time (Non-Native [interface org.knime.core.data.DataValue, interace org.knime.core.data.StringValue]),…”

If i switch the node back to a Joiner it works again.