160090: An input table is allowed one join at a time.
Description
The input table may be participating in another join. An input table can only participate in one join at a time.
Solution
Do one of the following.
Remove all joins from the input layer using the Remove Join tool and try again.
Write the input to disk using one of the following tools, and use this output as the new input:
Join to one of the layers joined to the input.