How to play old Minecraft PE maps with a newer version?

I was making a MCPE map to upload on the Internet but when i upgraded my MCPE to 0.14.0, i could not open my old map. It is telling me,"A newer version of the game has saved this level. It cannot be loaded." Please help me!!


At last, I founded out the answer. The map was made in Minecraft build 1 but i changed my version to build 4 after that. Thats why it was not working.