This problem appears when the module l10n_be_hr_payroll_fleet is installed with the
dynamic report for employees (enterprise module hr_contract_reports).
This module inherits from hr.contract and will create and modify some fields.
By modifying contract's table, PostgreSQL will drop the view from
hr_contract_employee_report. At the end of the installation, PostgreSQL will
check if tables exist, it isn't the case for the view from
hr_contract_employee_report, so it will recreate it.
It's the normal behavior.
But when a table is missing, a warning is logged and create problem with
Runbot. For this reason, it's better to log an Info and not a Warning message.
Validated with @rco
jbm-odoo
c44f6ffd61