diff --git a/config/config.default.yaml b/config/config.default.yaml
index 62959b6324..641375238a 100644
--- a/config/config.default.yaml
+++ b/config/config.default.yaml
@@ -853,7 +853,6 @@ sector:
   regional_co2_sequestration_potential:
     enable: true
     attribute:
-    - conservative estimate Mt
     - conservative estimate GAS Mt
     - conservative estimate OIL Mt
     - conservative estimate aquifer Mt
diff --git a/config/schema.default.json b/config/schema.default.json
index 739514c91a..90089646e6 100644
--- a/config/schema.default.json
+++ b/config/schema.default.json
@@ -4702,8 +4702,8 @@
         },
         "regional_co2_sequestration_potential": {
           "additionalProperties": true,
-          "description": "Add option for regionally-resolved geological carbon dioxide sequestration potentials based on `CO2StoP <https://setis.ec.europa.eu/european-co2-storage-database_en>`_.",
-          "markdownDescription": "Add option for regionally-resolved geological carbon dioxide sequestration potentials based on [CO2StoP ](https://setis.ec.europa.eu/european-co2-storage-database_en).",
+          "description": "Add option for regionally-resolved geological carbon dioxide sequestration potentials based on `CO2StoP <https://setis.ec.europa.eu/european-co2-storage-database_en>`_.Note that 'conservative estimate Mt' is not a summary of gas/oil fields and aquifers but contains storage potential for geological reservoirs suitable for CO2 storage excluding those. The more conservative assumption is to only include the three attributes mentioned above.",
+          "markdownDescription": "Add option for regionally-resolved geological carbon dioxide sequestration potentials based on [CO2StoP ](https://setis.ec.europa.eu/european-co2-storage-database_en).Note that 'conservative estimate Mt' is not a summary of gas/oil fields and aquifers but contains storage potential for geological reservoirs suitable for CO2 storage excluding those. The more conservative assumption is to only include the three attributes mentioned above.",
           "type": "object"
         },
         "co2_sequestration_potential": {
@@ -11182,8 +11182,8 @@
         },
         "regional_co2_sequestration_potential": {
           "additionalProperties": true,
-          "description": "Add option for regionally-resolved geological carbon dioxide sequestration potentials based on `CO2StoP <https://setis.ec.europa.eu/european-co2-storage-database_en>`_.",
-          "markdownDescription": "Add option for regionally-resolved geological carbon dioxide sequestration potentials based on [CO2StoP ](https://setis.ec.europa.eu/european-co2-storage-database_en).",
+          "description": "Add option for regionally-resolved geological carbon dioxide sequestration potentials based on `CO2StoP <https://setis.ec.europa.eu/european-co2-storage-database_en>`_.Note that 'conservative estimate Mt' is not a summary of gas/oil fields and aquifers but contains storage potential for geological reservoirs suitable for CO2 storage excluding those. The more conservative assumption is to only include the three attributes mentioned above.",
+          "markdownDescription": "Add option for regionally-resolved geological carbon dioxide sequestration potentials based on [CO2StoP ](https://setis.ec.europa.eu/european-co2-storage-database_en).Note that 'conservative estimate Mt' is not a summary of gas/oil fields and aquifers but contains storage potential for geological reservoirs suitable for CO2 storage excluding those. The more conservative assumption is to only include the three attributes mentioned above.",
           "type": "object"
         },
         "co2_sequestration_potential": {
diff --git a/scripts/lib/validation/config/sector.py b/scripts/lib/validation/config/sector.py
index 0ff3f482d5..2a96ba3962 100644
--- a/scripts/lib/validation/config/sector.py
+++ b/scripts/lib/validation/config/sector.py
@@ -715,7 +715,6 @@ class SectorConfig(BaseModel):
         default_factory=lambda: {
             "enable": True,
             "attribute": [
-                "conservative estimate Mt",
                 "conservative estimate GAS Mt",
                 "conservative estimate OIL Mt",
                 "conservative estimate aquifer Mt",
@@ -725,7 +724,7 @@ class SectorConfig(BaseModel):
             "max_size": 25,
             "years_of_storage": 25,
         },
-        description="Add option for regionally-resolved geological carbon dioxide sequestration potentials based on `CO2StoP <https://setis.ec.europa.eu/european-co2-storage-database_en>`_.",
+        description="Add option for regionally-resolved geological carbon dioxide sequestration potentials based on `CO2StoP <https://setis.ec.europa.eu/european-co2-storage-database_en>`_.Note that 'conservative estimate Mt' is not a summary of gas/oil fields and aquifers but contains storage potential for geological reservoirs suitable for CO2 storage excluding those. The more conservative assumption is to only include the three attributes mentioned above.",
     )
     co2_sequestration_potential: dict[int, float] = Field(
         default_factory=lambda: {