Not systematically. A study used internally for eco-design does not need to be rerun if it continues to guide sound choices. A study used in external communication (labelling, customer sales arguments) must be rerun if the sectoral PEFCR has published its new mapping and the version published by the competitor is calculated using the new database.
Read the source article: EF 3.1 has expired: which LCA database for a PEF?