diff --git a/schemas/ispyb/stored_programs/sp_upsert_dcg_grid.sql b/schemas/ispyb/stored_programs/sp_upsert_dcg_grid.sql
index 477123e..2f187f3 100644
--- a/schemas/ispyb/stored_programs/sp_upsert_dcg_grid.sql
+++ b/schemas/ispyb/stored_programs/sp_upsert_dcg_grid.sql
@@ -11,8 +11,8 @@ CREATE OR REPLACE DEFINER=`ispyb_root`@`%` PROCEDURE `upsert_dcg_grid`(
   p_stepsX double,
   p_stepsY double,
   p_meshAngle double,
-  p_pixelsPerMicronX float,
-  p_pixelsPerMicronY float,
+  p_micronsPerPixelX float,
+  p_micronsPerPixelY float,
   p_snapshotOffsetXPixel float,
   p_snapshotOffsetYPixel float,
   p_orientation enum('vertical','horizontal'),
@@ -21,11 +21,11 @@ CREATE OR REPLACE DEFINER=`ispyb_root`@`%` PROCEDURE `upsert_dcg_grid`(
     MODIFIES SQL DATA
 BEGIN
 	IF p_dcgId IS NOT NULL THEN
-      INSERT INTO GridInfo (gridInfoId, dataCollectionGroupId, dx_mm, dy_mm, steps_x, steps_y, meshAngle, 
-        pixelsPerMicronX, pixelsPerMicronY, micronsPerPixelX, micronsPerPixelY,
+      INSERT INTO GridInfo (gridInfoId, dataCollectionGroupId, dx_mm, dy_mm, steps_x, steps_y, meshAngle,
+        micronsPerPixelX, micronsPerPixelY,
         snapshot_offsetXPixel, snapshot_offsetYPixel, orientation, snaked)
-        VALUES (p_id, p_dcgId, p_dxInMm, p_dyInMm, p_stepsX, p_stepsY, p_meshAngle, 
-        p_pixelsPerMicronX, p_pixelsPerMicronY, p_pixelsPerMicronX, p_pixelsPerMicronY,
+        VALUES (p_id, p_dcgId, p_dxInMm, p_dyInMm, p_stepsX, p_stepsY, p_meshAngle,
+        p_micronsPerPixelX, p_micronsPerPixelY,
         p_snapshotOffsetXPixel, p_snapshotOffsetYPixel, p_orientation, p_snaked)
         ON DUPLICATE KEY UPDATE
 		  dataCollectionGroupId = IFNULL(p_dcgId, dataCollectionGroupId),
@@ -34,10 +34,8 @@ BEGIN
 		  steps_x = IFNULL(p_stepsX, steps_x),
 		  steps_y = IFNULL(p_stepsY, steps_y),
 		  meshAngle = IFNULL(p_meshAngle, meshAngle),
-		  pixelsPerMicronX = IFNULL(p_pixelsPerMicronX, pixelsPerMicronX),
-		  pixelsPerMicronY = IFNULL(p_pixelsPerMicronY, pixelsPerMicronY),
-      micronsPerPixelX = IFNULL(p_pixelsPerMicronX, micronsPerPixelX),
-      micronsPerPixelY = IFNULL(p_pixelsPerMicronY, micronsPerPixelY),
+		  micronsPerPixelX = IFNULL(p_pixelsPerMicronX, micronsPerPixelX),
+		  micronsPerPixelY = IFNULL(p_pixelsPerMicronY, micronsPerPixelY),
 		  snapshot_offsetXPixel = IFNULL(p_snapshotOffsetXPixel, snapshot_offsetXPixel),
 		  snapshot_offsetYPixel = IFNULL(p_snapshotOffsetYPixel, snapshot_offsetYPixel),
 		  orientation = IFNULL(p_orientation, orientation),
diff --git a/schemas/ispyb/updates/2025_03_21_GridInfo_pixelsPerMicron.sql b/schemas/ispyb/updates/2025_03_21_GridInfo_pixelsPerMicron.sql
new file mode 100644
index 0000000..b4df7fc
--- /dev/null
+++ b/schemas/ispyb/updates/2025_03_21_GridInfo_pixelsPerMicron.sql
@@ -0,0 +1,10 @@
+INSERT IGNORE INTO SchemaStatus (scriptName, schemaStatus) VALUES ('2025_03_21_GridInfo_pixelsPerMicron.sql', 'ONGOING');
+
+UPDATE GridInfo SET micronsPerPixelX = pixelsPerMicronX WHERE micronsPerPixelX IS NULL;
+UPDATE GridInfo SET micronsPerPixelY = pixelsPerMicronY WHERE micronsPerPixelY IS NULL;
+
+ALTER TABLE GridInfo
+	DROP COLUMN pixelsPerMicronX,
+	DROP COLUMN pixelsPerMicronY;
+
+UPDATE SchemaStatus SET schemaStatus = 'DONE' WHERE scriptName = '2025_03_21_GridInfo_pixelsPerMicron.sql';