E133: The same value is matched twice in one compare

A compare tries its matches arms from top to bottom and runs the first one that fits. If a later arm matches a value an earlier arm already handles, the later arm can never run – and Turf treats that as a mistake rather than letting dead code sit quietly, because it nearly always means one of the two arms was meant to match something else.

compare day {    matches 1: ... done    matches 2: ... done    matches 1: ... done          // 1 is already handled above}

Either change the repeated value to the one you meant, delete the extra arm, or – if both arms should do the same thing – stack them so they share one body:

compare day {    matches 1:    matches 7: ... done          // 1 or 7    matches 2: ... done}

(A different situation: an arm that can never run because an earlier catch-all arm matches everything – matches _: – is only a warning, E094.)

Run turf --explain E133 in a terminal to read this again.