Thank you for your question. It is certainly an interesting one.
It is a practical decision that falls under the clerk's authority and depends on the nature of the petitions and people reviewing them.
They carefully examine the text of the two petitions. If the subject of the second petition is too similar to the first, they will not deem the second petition non-compliant; instead, they will decide that it cannot be posted immediately. The second petition cannot be posted until the period during which the first petition is posted is over. National Assembly staff, under the president's, or speaker's, authority, carefully analyze and compare the two petitions. Ultimately, the decision falls to the president should a question arise.