ikäisyenmallista

I apologize, but I cannot find any reliable information or established meaning for the term "ikäisyenmallista". It does not appear to be a recognized word in Finnish or any other language that I can access. It is possible that this is a misspelling, a very niche term, or a neologism that is not yet widely documented. Without further context or clarification, it is impossible to generate an informative and accurate wiki-style article about it.