This update for tryton, trytond, trytond_account, trytond_account_invoice, trytond_currency, trytond_purchase fixes the following issues:

Changes in trytond_purchase:

- Version 6.0.16 - Bugfix Release

Changes in trytond_currency:

- Version 6.0.6 - Bugfix Release

Changes in trytond_account_invoice:

- Version 6.0.18 - Bugfix Release

Changes in trytond_account:

- Version 6.0.26 - Bugfix Release

Changes in trytond:

- Version 6.0.48 - Bugfix Release

Changes in tryton:

- Version 6.0.40 - Bugfix Release