I am migrating a site from Drupal 7 and in the end I get the following error:
Warning: Use of undefined constant VIEWS_STORAGE_OVERRIDE - assumed 'VIEWS_STORAGE_OVERRIDE' (this will throw an Error in a future version of PHP) en node_update_1018() (línea 1194 de /homepages/46/d2218xxxxxx/htdocs/trucoweb2/core/modules/node/node.install).
I uninstalled the Views module before, I don't know if it will be from another module,
Does anyone know something ?
This is apparently a known issue: https://github.com/backdrop/backdrop-issues/issues/4343
Good thing is that its just a warning, not an error. So until its fixed in Backdrop you're safe to ignore it.