diff --git a/php/src/Docker/DockerActionManager.php b/php/src/Docker/DockerActionManager.php
index 494d452f..e9838740 100644
--- a/php/src/Docker/DockerActionManager.php
+++ b/php/src/Docker/DockerActionManager.php
@@ -436,7 +436,10 @@ class DockerActionManager
                 ]
             );
         } catch (RequestException $e) {
-            throw $e;
+            // 409 is undocumented and gets thrown if the network already exists.
+            if ($e->getCode() !== 409) {
+                throw $e;
+            }
         }
 
         $url = $this->BuildApiUrl(