I think one should write, rewrite, and revise a poem for a period of at least 3 months. Then one can leave it alone. The poem is a construction of a big idea into a little nugget. As I want to keep the original I will keep the original, but publish new versions as version two, three, four, five, etc. So it may seem awkward to the reader, but its an evolution of my idea from birth to full life. A sanctification of the poem (so to speak). Sanctification never leaves a poem dead to all sins. A poem is alive because it changes over time and becomes a purer idea, or an idea with a new path.
