Fix variable to find correct prospection tasks

models/project.py

@@ -156,7 +156,7 @@ class FilamentProjetCashFlow(models.Model):
         nom = account.name
 
         ## Cash Flow Request
-        prospection_tasks = self.env['project.task'].search([('name','=ilike','Prospection'+'%'),('project_id','=',self.id)]).ids
+        prospection_tasks = self.env['project.task'].search([('name','=ilike','Prospection'+'%'),('project_id','=',project_id)]).ids
         if not prospection_tasks:
             self.env.cr.execute("""
                 SELECT date, sum(sum(amount)) over (order by date) as Total,