Hello everyone!!, in the blog I will share my experience that how things become terrifying if the new version of some product is released in plone. The main problem occurs when we have not pin up the products to the specific versions in the buildouts. Wow!! its a lot much at one shot. Don't worry we will understand each and everything. Lets start.. Plone uses buildouts to make a structure of its code. There are builduts.cfg (Configuration files) to set up plone projects. What is buildout ? Buildout is a Python-based build system for creating, assembling and deploying applications from multiple parts, some of which may be non-Python-based. It lets you create a buildout configuration and reproduce the same software later. So plone uses these buildouts for setups. I have also configured the buildout for my project and things were going great until there is new release for plone 5.0.dev from plone 4.3.6(the previous plone version). Here is the snip...