The invoice recurrence of subscription "%(subscription)s" does not generate any occurrence. The consumption recurrence of line "%(line)s" of subscription "%(subscription)s" does not generate any occurrence. You cannot modify invoiced consumption "%(consumption)s". You cannot delete invoiced consumption "%(consumption)s". To invoice consumptions you must define an account revenue for product "%(product)s". You cannot erase party "%(party)s" while they have pending subscriptions with company "%(company)s". Invalid "%(field)s" "%(value)s" in recurence rule "%(recurrence_rule)s" with exception "%(exception)s".