diff --git a/system/Cache/Handlers/PredisHandler.php b/system/Cache/Handlers/PredisHandler.php
index 79e7ae98f916..e8c4759ed9eb 100644
--- a/system/Cache/Handlers/PredisHandler.php
+++ b/system/Cache/Handlers/PredisHandler.php
@@ -155,14 +155,14 @@ public function increment(string $key, int $offset = 1): int
     {
         $key = static::validateKey($key);
 
-        return $this->redis->hincrby($key, 'data', $offset);
+        return $this->redis->hincrby($key, '__ci_value', $offset);
     }
 
     public function decrement(string $key, int $offset = 1): int
     {
         $key = static::validateKey($key);
 
-        return $this->redis->hincrby($key, 'data', -$offset);
+        return $this->redis->hincrby($key, '__ci_value', -$offset);
     }
 
     public function clean(): bool
diff --git a/tests/system/Cache/Handlers/PredisHandlerTest.php b/tests/system/Cache/Handlers/PredisHandlerTest.php
index 91949f53238f..9f5b63b13309 100644
--- a/tests/system/Cache/Handlers/PredisHandlerTest.php
+++ b/tests/system/Cache/Handlers/PredisHandlerTest.php
@@ -162,6 +162,23 @@ public function testDeleteMatchingNothing(): void
         $this->assertSame(0, $this->handler->deleteMatching('user_1_info*'));
     }
 
+    public function testIncrementAndDecrement(): void
+    {
+        $this->handler->save('counter', 100);
+
+        foreach (range(1, 10) as $step) {
+            $this->handler->increment('counter', $step);
+        }
+
+        $this->assertSame(155, $this->handler->get('counter'));
+
+        $this->assertSame(135, $this->handler->decrement('counter', 20));
+        $this->assertSame(135, $this->handler->get('counter'));
+
+        $this->assertSame(140, $this->handler->increment('counter', 5));
+        $this->assertSame(140, $this->handler->get('counter'));
+    }
+
     public function testClean(): void
     {
         $this->handler->save(self::$key1, 1);