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from the [BIP44 specification], the HD derivation path is defined as :
m / purpose' / coin_type' / account' / change / address_index
What does the ' sign means in it?
Apostrophe in the path means that its hardened derivation.
That means, that for a given wallet its constant.
Notice that the change and the address_index part is not marked as hardened. That's why you can generate multiple addresses for one account in e.g. bitcoin
I can't state that for sure for all networks
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