diff --git a/schemas/V_delta/stable/projectvar.json b/schemas/V_delta/deprecated/projectvar.json
similarity index 98%
rename from schemas/V_delta/stable/projectvar.json
rename to schemas/V_delta/deprecated/projectvar.json
index 9268a93..ffc5648 100644
--- a/schemas/V_delta/stable/projectvar.json
+++ b/schemas/V_delta/deprecated/projectvar.json
@@ -7,7 +7,7 @@
                 "class_name": "base"
             }
         ],
-        "maturity_level": "stable"
+        "maturity_level": "deprecated"
     },
     "depends_on": [
         {
diff --git a/schemas/V_delta/index.json b/schemas/V_delta/index.json
index c3f72fb..6b1f08e 100644
--- a/schemas/V_delta/index.json
+++ b/schemas/V_delta/index.json
@@ -702,13 +702,13 @@
     },
     {
       "class_name": "projectvar",
-      "tier": "stable",
+      "tier": "deprecated",
       "class_version": "1.0.0",
-      "maturity_level": "stable",
+      "maturity_level": "deprecated",
       "superclasses": [
         "base"
       ],
-      "path": "schemas/V_delta/stable/projectvar.json",
+      "path": "schemas/V_delta/deprecated/projectvar.json",
       "is_meta": false
     },
     {
diff --git a/schemas/V_epsilon/stable/projectvar.json b/schemas/V_epsilon/deprecated/projectvar.json
similarity index 98%
rename from schemas/V_epsilon/stable/projectvar.json
rename to schemas/V_epsilon/deprecated/projectvar.json
index 9268a93..ffc5648 100644
--- a/schemas/V_epsilon/stable/projectvar.json
+++ b/schemas/V_epsilon/deprecated/projectvar.json
@@ -7,7 +7,7 @@
                 "class_name": "base"
             }
         ],
-        "maturity_level": "stable"
+        "maturity_level": "deprecated"
     },
     "depends_on": [
         {
diff --git a/schemas/V_epsilon/index.json b/schemas/V_epsilon/index.json
index 53e3c1f..5a454db 100644
--- a/schemas/V_epsilon/index.json
+++ b/schemas/V_epsilon/index.json
@@ -1278,13 +1278,13 @@
     },
     {
       "class_name": "projectvar",
-      "tier": "stable",
+      "tier": "deprecated",
       "class_version": "1.0.0",
-      "maturity_level": "stable",
+      "maturity_level": "deprecated",
       "superclasses": [
         "base"
       ],
-      "path": "schemas/V_epsilon/stable/projectvar.json",
+      "path": "schemas/V_epsilon/deprecated/projectvar.json",
       "is_meta": false
     },
     {
diff --git a/schemas/V_epsilon/topics.json b/schemas/V_epsilon/topics.json
index 4fb61b6..f460ca2 100644
--- a/schemas/V_epsilon/topics.json
+++ b/schemas/V_epsilon/topics.json
@@ -159,11 +159,12 @@
       "name": "deprecated",
       "description": "Classes deprecated in V_epsilon, retained for migration of legacy instances.",
       "classes": [
+        "projectvar",
+        "subject_group",
         "treatment",
         "treatment_drug",
         "treatment_transfer",
-        "virus_injection",
-        "subject_group"
+        "virus_injection"
       ]
     },
     {
@@ -272,6 +273,7 @@
       "classes": [
         "control_stimulus_ids",
         "reverse_correlation",
+        "stimulus_approach",
         "stimulus_bath",
         "stimulus_parameter",
         "stimulus_parameter_table",