Excel DataValidation List exclude value in range -

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can think of clever way can exclude value in data validation list?

currently using dropdown(a1) generate dependant dropdown(a2) using in data validation list source

 =indirect(left(a1,5)&"list")

the first 5 chars in first dropdown values makes part of named range second dropdown

however in these dependent lists there values want ignore contain words "do not use"

i cant remove them named ranges not show them in second dropdown if possible

i know named ranges can made of multiple ranges i'm not sure if possible dynamically generate array formula in source box using 1 named range (i need keep named range including "xxx not use" other things , id rather not create multiple named ranges sames lists if possible "xxx not use" may change able use in future , "do not use" removed value)


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