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i tried with Steaemworld and got the error :
Assert Exception:op.vesting_shares >= min_delegation: Account must delegate a minimum of {"amount":"1890681094","precision":6,"nai":"@@000000037"}

will try the "steampeak" now

You need to wait 5 or 7 days before SP will return to you after undelegate.

i see thank you
i saw in someplace was written that the delegation will expire in two days. so I will wit :-)