As a grammar hint, it is stated under the entry for "In case" within Longman Dictionary of Contemporary that we have to use simple present/past or should after in case, for example:
They locked themselves in their houses in case there was more trouble.
But do we have to use these tenses for all verbs in the clause which starts with in case? For example is the following statement correct grammatically?
You should back up your data in case there is a problem which will lead to a data loss.
Or should we write it as follows?
You should back up your data in case there is a problem which leads to a data loss.