diff --git a/src/Cache/CacheClient.php b/src/Cache/CacheClient.php
index 8f06f9e..5d80b25 100644
--- a/src/Cache/CacheClient.php
+++ b/src/Cache/CacheClient.php
@@ -746,6 +746,7 @@ public function setIfNotEqual(string $cacheName, string $key, string $value, str
      * Associates the given key with the given value. If a value for the key is
      * already present it is not replaced with the new value.
      *
+     * @deprecated Use setIfAbsentAsync instead
      * @param string $cacheName Name of the cache to store the key and value in
      * @param string $key The key to set.
      * @param string $value The value to be stored.
@@ -784,6 +785,7 @@ public function setIfNotExistsAsync(string $cacheName, string $key, string $valu
      * Associates the given key with the given value. If a value for the key is
      * already present it is not replaced with the new value.
      *
+     * @deprecated Use setIfAbsent instead
      * @param string $cacheName Name of the cache to store the key and value in
      * @param string $key The key to set.
      * @param string $value The value to be stored.
diff --git a/src/Cache/Internal/ScsDataClient.php b/src/Cache/Internal/ScsDataClient.php
index 3132933..b2c4c9d 100644
--- a/src/Cache/Internal/ScsDataClient.php
+++ b/src/Cache/Internal/ScsDataClient.php
@@ -631,6 +631,9 @@ function () use ($call): SetIfNotEqualResponse {
     }
 
     /**
+     * SetIfNotExists is deprecated on the service. Here we call the new SetIfAbsent
+     * and return SetIfNotExists responses.
+     * @deprecated Use SetIfAbsent instead
      * @param string $cacheName
      * @param string $key
      * @param string $value
@@ -643,11 +646,12 @@ public function setIfNotExists(string $cacheName, string $key, string $value, $t
             validateCacheName($cacheName);
             validateNullOrEmpty($key, "Key");
             $ttlMillis = $this->ttlToMillis($ttlSeconds);
-            $setIfNotExistsRequest = new _SetIfNotExistsRequest();
+            $setIfNotExistsRequest = new _SetIfRequest();
+            $setIfNotExistsRequest->setAbsent(new Absent());
             $setIfNotExistsRequest->setCacheKey($key);
             $setIfNotExistsRequest->setCacheBody($value);
             $setIfNotExistsRequest->setTtlMilliseconds($ttlMillis);
-            $call = $this->grpcManager->client->SetIfNotExists(
+            $call = $this->grpcManager->client->SetIf(
                 $setIfNotExistsRequest,
                 ["cache" => [$cacheName]],
                 ["timeout" => $this->timeout],