GarageBand 2.3.12 project compatibility issue on iPhone 6s

Good evening! I have an iPhone 6s with GarageBand version 2.3.12 (5189), where I have recorded several projects. When I tried to open one of them yesterday, GarageBand displayed the message "this project can only be opened in a newer version of GarageBand". However, I cannot update GarageBand, since the iPhone 6 does not allow updating to iOS 18. I ask, if GarageBand is opening and working normally in this old version, is there anything that can be done with these projects so that they work again in this old version of the application?

[Re-Titled by Moderator]