old_contents: # Copyright 2017 ACSONE SA/NV
  # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
  
  from odoo import fields, models
  
  
  class AccountMoveLine(models.Model):
  
      _inherit = 'account.move.line'
  
      date_range_fy_id = fields.Many2one(
          related='move_id.date_range_fy_id',
          store=True, copy=False)
  
new_contents: # Copyright 2017 ACSONE SA/NV
  # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
  
  from odoo import fields, models
  
  
  class AccountMoveLine(models.Model):
  
      _inherit = 'account.move.line'
  
      date_range_fy_id = fields.Many2one(
          related='move_id.date_range_fy_id',
      )
  
subject: Remove unneeded and inefficient "store=True"