toFeedItem must be compatible with Spatie Feed Feedable toFeedItem Spatie Feed FeedItem

SymfonyComponentErrorHandlerErrorFatalError: Declaration of ModulesPostsEntitiesPostold::toFeedItem() have to be suitable with SpatieFeedFeedable::toFeedItem(): SpatieFeedFeedItem in file /mnt/volume_nyc1_02/stc_ar/Modules/Posts/Entities/Postold.php on line 33
#0 {essential}