Add deprecation for INVERSION with number

src/ert/config/analysis_config.py

@@ -80,12 +80,19 @@ def __init__(
                 continue
             if var_name in ["INVERSION", "IES_INVERSION"]:
                 if value in inversion_str_map[module_name]:
-                    value = inversion_str_map[module_name][value]
+                    new_value = inversion_str_map[module_name][value]
                     if var_name == "IES_INVERSION":
                         ConfigWarning.ert_context_warn(
                             "IES_INVERSION is deprecated, please use INVERSION instead:\n"
-                            f"ANALYSIS_SET_VAR {module_name} INVERSION {value.upper()}"
+                            f"ANALYSIS_SET_VAR {module_name} INVERSION {new_value.upper()}"
                         )
+                    else:
+                        ConfigWarning.ert_context_warn(
+                            f"Using {value} is deprecated, use:\n"
+                            f"ANALYSIS_SET_VAR {module_name} INVERSION {new_value.upper()}"
+                        )
+                    value = new_value
+
                 var_name = "inversion"
             key = var_name.lower()
             options[module_name][key] = value

tests/unit_tests/config/test_analysis_config.py

@@ -1,3 +1,4 @@
+import warnings
 from textwrap import dedent
 
 import hypothesis.strategies as st
@@ -283,3 +284,26 @@ def test_num_realizations_0_means_all():
         ).minimum_required_realizations
         == 100
     )
+
+
+@pytest.mark.parametrize(
+    "config, expected",
+    [
+        (
+            ["STD_ENKF", "INVERSION", "1"],
+            "Using 1 is deprecated, use:\nANALYSIS_SET_VAR STD_ENKF INVERSION SUBSPACE",
+        ),
+        (
+            ["STD_ENKF", "IES_INVERSION", "1"],
+            "IES_INVERSION is deprecated, please use INVERSION instead",
+        ),
+    ],
+)
+def test_incorrect_variable_deprecation_warning(config, expected):
+    with warnings.catch_warnings(record=True) as all_warnings:
+        _ = AnalysisConfig.from_dict(
+            {
+                ConfigKeys.ANALYSIS_SET_VAR: [config],
+            }
+        )
+    assert expected in [str(warning.message) for warning in all_warnings]