OVERLOAD matching: varchar(10) & varchar(20)

I have an existing overloaded prototype that has a procedure with an input
parameter of varchar(20). I need to add a varchar(10). I put the new,
shorter prototype first in the OVERLOAD so it'll find that one first. The
module compiles, but the calling program (SQLRPGLE) fails to compile with a
severity 30 error:
RNF0203 PROTOTYPES &1 AND &2 BOTH MATCH THE CALL; FIRST MATCH ASSUMED.

I'm OK with using the first match, but the severity 30 is blocking the
compile. Any idea what I'm missing?


Thanks