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And what is this?

It said in the memo max age which means your post was too old.

How too? What are the specific conditions?
There is no info in the post about it (

No idea, guessing 3.5 days

So why do you answer??
I thought that you are this bot developer/post author in @steemmonsters (

I answered because I read the response the bot sent you and it clearly says it is rejected due to “max age”.