diff --git a/models/mrp_production.py b/models/mrp_production.py
index f71e3d4..b0a2dea 100644
--- a/models/mrp_production.py
+++ b/models/mrp_production.py
@@ -37,9 +37,26 @@ class MrpProduction(models.Model):
         return moves
 
     def _update_raw_moves(self, factor):
-        # Prevent floating point noise during UPDATE quantity
-        clean_factor = round(factor, 8)
-        return super()._update_raw_moves(clean_factor)
+        # Odoo core _update_raw_moves multiplies `old_qty * factor` and rounds UP.
+        # If factor is 0.9799118079... and old_qty is 71435, the math results in 70000.00000000004
+        # Odoo's UP rounding elevates this dust to 70000.001!
+        # We must let Odoo do its thing, but then surgically clean the dust.
+        res = super()._update_raw_moves(factor)
+        
+        clean_res = []
+        for move, old_qty, new_qty in res:
+            exact_qty = old_qty * factor
+            # Clean floating point microscopic dust (e.g. 70000.0000000004 -> 70000.0)
+            clean_exact_qty = round(exact_qty, 8)
+            
+            from odoo.tools import float_round
+            ideal_qty = float_round(clean_exact_qty, precision_rounding=move.product_uom.rounding, rounding_method='UP')
+            
+            if move.product_uom_qty != ideal_qty:
+                move.write({'product_uom_qty': ideal_qty})
+            clean_res.append((move, old_qty, ideal_qty))
+            
+        return clean_res
 
     packaging_id = fields.Many2one('mrp.packaging', string='Packaging', domain="[('product_tmpl_id', '=', product_tmpl_id)]", check_company=True)
     packaging_qty = fields.Float('Quantity Packaging', compute='_compute_packaging_qty', inverse='_inverse_packaging_qty', store=True, readonly=False)