Bug === If we create a selection properties with some options, change the type to char, and then again to selection, the options are restored. But, if we just change the type to char, the options of the old property are stored in the database, and we don't want that. Task-3346103 closes odoo/odoo#124129 X-original-commit: 35c99a9110cec3317f36d4ddffae5196b58939e5 Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>