diff --git a/.upgradenotes/MDL-80430-2024083015011365.yml b/.upgradenotes/MDL-80430-2024083015011365.yml
new file mode 100644
index 00000000000..e143383bb57
--- /dev/null
+++ b/.upgradenotes/MDL-80430-2024083015011365.yml
@@ -0,0 +1,8 @@
+issueNumber: MDL-80430
+notes:
+  core_reportbuilder:
+    - message: >-
+        Final removal of support for `get_default_table_aliases` method.
+        Entities must now implement `get_default_tables`, which is now abstract,
+        to define the tables they use
+      type: removed
diff --git a/reportbuilder/classes/local/entities/base.php b/reportbuilder/classes/local/entities/base.php
index d396e4464b3..5f721b70980 100644
--- a/reportbuilder/classes/local/entities/base.php
+++ b/reportbuilder/classes/local/entities/base.php
@@ -57,40 +57,18 @@ abstract class base {
     private $conditions = [];
 
     /**
-     * Database tables that this entity uses
-     *
-     * Must be overridden by the entity to list all database tables that it expects to be present in the main
-     * SQL or in JOINs added to this entity
-     *
-     * @todo in Moodle 4.8 - make abstract when support for {@see get_default_table_aliases} is finally removed
+     * Database tables that the entity expects to be present in the main SQL or in JOINs added to it
      *
      * @return string[]
      */
-    protected function get_default_tables(): array {
-        static $debuggingshown;
-
-        // The default implementation falls back to retrieving deprecated table aliases to determine our table names.
-        $tablenamealiases = $this->get_default_table_aliases();
-        if (!empty($tablenamealiases) && !$debuggingshown) {
-            debugging('The function get_default_table_aliases() is deprecated, please define the entity' .
-                ' tables with get_default_tables() in ' . static::class, DEBUG_DEVELOPER);
-
-            // Don't be too spammy with the debugging, this method is called multiple times per entity load.
-            $debuggingshown = true;
-        }
-
-        return array_keys($tablenamealiases);
-    }
+    abstract protected function get_default_tables(): array;
 
     /**
-     * Database tables that this entity uses and their default aliases (note that these aliases are now ignored)
-     *
-     * @return string[] Array of $tablename => $alias
-     *
      * @deprecated since Moodle 4.4 - aliases are now autogenerated, please implement {@see get_default_tables} instead
      */
-    protected function get_default_table_aliases(): array {
-        return [];
+    #[\core\attribute\deprecated('::get_default_tables', since: '4.4', mdl: 'MDL-79397', final: true)]
+    protected function get_default_table_aliases(): void {
+        \core\deprecation::emit_deprecation_if_present([self::class, __FUNCTION__]);
     }
 
     /**