[Closed] error in redefine attributes

 attributes "Test"
 	redefine:def
 (
 	parameters testP
 	(
 		MyFloat 	   type:#float
 		MyFloat2 	   type:#float
 	)
 )
 
 custAttributes.add $.modifiers[1] def
 

is erroring with

 -- Error occurred in anonymous codeblock; filename: D:\3D\Projects\MSUCPhase3\MOdels	est.ms; position: 39
 -- Compile error: redefine: must be an attributes definition value, in Test
 --  In line: 	redefine:def
 

Is my syntax wrong?