diff --git a/taskcluster/fenix_taskgraph/parameters.py b/taskcluster/fenix_taskgraph/parameters.py
index 73ae7bedd..7d012d452 100644
--- a/taskcluster/fenix_taskgraph/parameters.py
+++ b/taskcluster/fenix_taskgraph/parameters.py
@@ -13,17 +13,12 @@ extend_parameters_schema(
         Required("pull_request_number"): Any(All(int, Range(min=1)), None),
         Required("release_type", default=""): str,
         Optional("shipping_phase"): Any("build", "promote", "ship", None),
-        Required("version", default=""): str,
-        Required("next_version", default=""): Any(None, str),
     }
 )
 
 
 def get_decision_parameters(graph_config, parameters):
     parameters.setdefault("release_type", "")
-    head_tag = parameters["head_tag"]
-    parameters["version"] = head_tag[1:] if head_tag else ""
 
     pr_number = os.environ.get("MOBILE_PULL_REQUEST_NUMBER", None)
     parameters["pull_request_number"] = None if pr_number is None else int(pr_number)
-    parameters.setdefault("next_version", None)