diff --git a/.upgradenotes/MDL-86997-2025102314343463.yml b/.upgradenotes/MDL-86997-2025102314343463.yml
new file mode 100644
index 00000000000..d555f502ffe
--- /dev/null
+++ b/.upgradenotes/MDL-86997-2025102314343463.yml
@@ -0,0 +1,10 @@
+issueNumber: MDL-86997
+notes:
+  core_reportbuilder:
+    - message: |
+        The following `user_filter_manager` methods have been deprecated:
+
+        * `reset_all()` - to be replaced by new `reset()` method
+        * `reset_single()`
+        * `merge()`
+      type: deprecated
diff --git a/public/reportbuilder/classes/external/filters/reset.php b/public/reportbuilder/classes/external/filters/reset.php
index b999e4d0879..fba7623e0bf 100644
--- a/public/reportbuilder/classes/external/filters/reset.php
+++ b/public/reportbuilder/classes/external/filters/reset.php
@@ -33,7 +33,6 @@ use core_reportbuilder\local\helpers\user_filter_manager;
  * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 class reset extends external_api {
-
     /**
      * External method parameters
      *
@@ -72,7 +71,7 @@ class reset extends external_api {
             permission::require_can_view_report($persistent);
         }
 
-        return user_filter_manager::reset_all($reportid);
+        return user_filter_manager::reset($reportid);
     }
 
     /**
diff --git a/public/reportbuilder/classes/local/helpers/user_filter_manager.php b/public/reportbuilder/classes/local/helpers/user_filter_manager.php
index f3030eb168c..cdcd366a733 100644
--- a/public/reportbuilder/classes/local/helpers/user_filter_manager.php
+++ b/public/reportbuilder/classes/local/helpers/user_filter_manager.php
@@ -29,7 +29,6 @@ use core_text;
  * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 class user_filter_manager {
-
     /**
      * Set user filters for given report
      *
@@ -84,8 +83,13 @@ class user_filter_manager {
      * @param array $values
      * @param int|null $userid
      * @return bool
+     *
+     * @deprecated since Moodle 5.2 - please do not use this function any more
      */
+    #[\core\attribute\deprecated(reason: 'It is no longer used', mdl: 'MDL-86997', since: '5.2')]
     public static function merge(int $reportid, array $values, ?int $userid = null): bool {
+        \core\deprecation::emit_deprecation([self::class, __FUNCTION__]);
+
         $existing = static::get($reportid, $userid);
 
         return static::set($reportid, array_merge($existing, $values), $userid);
@@ -96,10 +100,9 @@ class user_filter_manager {
      *
      * @param int $reportid
      * @param int|null $userid
-     * @param int $index Unused
      * @return bool
      */
-    public static function reset_all(int $reportid, ?int $userid = null, int $index = 0): bool {
+    public static function reset(int $reportid, ?int $userid = null): bool {
         global $DB, $USER;
 
         $userid ??= $USER->id;
@@ -107,6 +110,23 @@ class user_filter_manager {
         return $DB->delete_records(user_filter::TABLE, ['reportid' => $reportid, 'usercreated' => $userid]);
     }
 
+    /**
+     * Reset all user filters for given report
+     *
+     * @param int $reportid
+     * @param int|null $userid
+     * @param int $index Unused
+     * @return bool
+     *
+     * @deprecated since Moodle 5.2 - please use {@see reset} instead
+     */
+    #[\core\attribute\deprecated('::reset', mdl: 'MDL-86997', since: '5.2')]
+    public static function reset_all(int $reportid, ?int $userid = null, int $index = 0): bool {
+        \core\deprecation::emit_deprecation([self::class, __FUNCTION__]);
+
+        return static::reset($reportid, $userid);
+    }
+
     /**
      * Reset single user filter for given report
      *
@@ -114,12 +134,17 @@ class user_filter_manager {
      * @param string $uniqueidentifier
      * @param int|null $userid
      * @return bool
+     *
+     * @deprecated since Moodle 5.2 - please do not use this function any more
      */
+    #[\core\attribute\deprecated(reason: 'It is no longer used', mdl: 'MDL-86997', since: '5.2')]
     public static function reset_single(int $reportid, string $uniqueidentifier, ?int $userid = null): bool {
+        \core\deprecation::emit_deprecation([self::class, __FUNCTION__]);
+
         $originalvalues = static::get($reportid, $userid);
 
         // Remove any filters whose name is prefixed by given identifier.
-        $values = array_filter($originalvalues, static function(string $filterkey) use ($uniqueidentifier): bool {
+        $values = array_filter($originalvalues, static function (string $filterkey) use ($uniqueidentifier): bool {
             return core_text::strpos($filterkey, $uniqueidentifier) !== 0;
         }, ARRAY_FILTER_USE_KEY);
 
diff --git a/public/reportbuilder/tests/local/helpers/user_filter_manager_test.php b/public/reportbuilder/tests/local/helpers/user_filter_manager_test.php
index a9893794e4f..8ecf0e8290d 100644
--- a/public/reportbuilder/tests/local/helpers/user_filter_manager_test.php
+++ b/public/reportbuilder/tests/local/helpers/user_filter_manager_test.php
@@ -32,17 +32,6 @@ use core_user\reportbuilder\datasource\users;
  * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 final class user_filter_manager_test extends advanced_testcase {
-    /**
-     * Helper method to return all user preferences for filters - based on the current storage backend using the same
-     *
-     * @return array
-     */
-    private function get_filter_preferences(): array {
-        return array_filter(get_user_preferences(), static function(string $key): bool {
-            return strpos($key, 'reportbuilder-report-') === 0;
-        }, ARRAY_FILTER_USE_KEY);
-    }
-
     /**
      * Data provider for {@see test_get}
      *
@@ -93,11 +82,11 @@ final class user_filter_manager_test extends advanced_testcase {
     }
 
     /**
-     * Data provider for {@see test_reset_all}
+     * Data provider for {@see test_reset}
      *
      * @return array
      */
-    public static function reset_all_provider(): array {
+    public static function reset_provider(): array {
         return [
             'Small value' => ['foo'],
             'Large value' => [str_repeat('A', 4000)],
@@ -110,9 +99,9 @@ final class user_filter_manager_test extends advanced_testcase {
      *
      * @param string $value
      *
-     * @dataProvider reset_all_provider
+     * @dataProvider reset_provider
      */
-    public function test_reset_all(string $value): void {
+    public function test_reset(string $value): void {
         $this->resetAfterTest();
 
         /** @var core_reportbuilder_generator $generator */
@@ -123,7 +112,7 @@ final class user_filter_manager_test extends advanced_testcase {
             'entity:filter_name' => $value,
         ]);
 
-        $reset = user_filter_manager::reset_all($report->get('id'));
+        $reset = user_filter_manager::reset($report->get('id'));
         $this->assertTrue($reset);
 
         // We should get an empty array back.
@@ -151,6 +140,7 @@ final class user_filter_manager_test extends advanced_testcase {
         ]);
 
         $reset = user_filter_manager::reset_single($report->get('id'), 'entity:other');
+        $this->assertDebuggingCalled();
         $this->assertTrue($reset);
 
         $this->assertEquals([
@@ -181,7 +171,7 @@ final class user_filter_manager_test extends advanced_testcase {
             'entity:filter_name' => 'twotimesfoo',
             'entity:filter_value' => 'twotimesbar',
         ]);
-
+        $this->assertDebuggingCalled();
         $this->assertEqualsCanonicalizing([
             'entity:filter_name' => 'twotimesfoo',
             'entity:filter_value' => 'twotimesbar',