If it is a continuation – yes, otherwise no. The number of the project should be given. Even if the applicant mentions that a similar proposal has already been submitted, this will be checked very carefully by REA. If after checking REA sees it is not the case, they will not consider it to be similar.
Funded by the European Union. Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the Research Executive Agency (REA). Neither the European Union nor the REA can be held responsible for them.