diff --git a/README.rst b/README.rst
index 9eabda9..6c4d2e4 100644
--- a/README.rst
+++ b/README.rst
@@ -9,37 +9,51 @@ pip install mds-edocument-xrechnung
 
 Requires
 ========
-- Tryton 7.0
+- Tryton 6.8
 
 Changes
 =======
 
-*7.0.10 - 12.12.2024*
+*6.8.16 - 11.06.2025*
+
+- fix xml-content to be more valid
+
+*6.8.15 - 02.05.2025*
+
+- update license
+
+*6.8.14 - 29.01.2025*
+
+- updt:  optimize rounding of unit_price
+
+*6.8.13 - 28.01.2025*
+
+- fix: rounding of unit_price at invoice-line
+
+*6.8.12 - 09.01.2025*
+
+- handle tax childs (Jan Grasnick <jan@mittelwind.de>)
+
+*6.8.11 - 19.12.2024*
+
+- Lookup parent taxes for unece tax codes.
+- Improve the help text of xrechnung_routeid. Correct a translation.
+  (Mathias Behrle <mathiasb@m9s.biz>)
+
+*6.8.10 - 18.12.2024*
 
 - fix missing views
 - Remove arguments in super() calls. (Mathias Behrle)
 
-*7.0.9 - 11.12.2024*
+*6.8.9 - 11.12.2024*
 
 - fix name of party in exceptions
 
-*7.0.7 - 10.12.2024*
+*6.8.7 - 10.12.2024*
 
-- add iban to xml-export
+- add: export of factur-x 1.07.2, XRechnung 2.3 + 3.0
 
-*7.0.6 - 09.12.2024*
+*6.8.2 - 30.06.2023*
 
-- add: check for valid data to generate xml
-
-*7.0.5 - 05.12.2024*
-
-- add: export Factur-X 1.07.2
-
-*7.0.4 - 05.12.2024*
-
-- add: export XRechnung 2.3 + 3.0
-- updt: xrechnung-route-id optional
-
-*7.0.3 - 22.12.2023*
-
-- compatibility to Tryton 7.0
+- add credit-note
+- compatibility to Tryton 6.8
diff --git a/mixin.py b/mixin.py
index dc235ac..1ffdd6f 100644
--- a/mixin.py
+++ b/mixin.py
@@ -168,9 +168,6 @@ class EdocumentMixin(object):
         Args:
             line (record): model account.invoice.line
         """
-        if not hasattr(line, 'modegross'):
-            return line.amount
-
         if line.modegross == 'net':
             return line.amount
         elif line.modegross == 'gross':
diff --git a/setup.py b/setup.py
index c82d777..4709885 100644
--- a/setup.py
+++ b/setup.py
@@ -34,8 +34,8 @@ with open(path.join(here, 'versiondep.txt'), encoding='utf-8') as f:
         modversion[l2[0]] = {'min': l2[1], 'max': l2[2], 'prefix': l2[3]}
 
 # tryton-version
-major_version = 7
-minor_version = 0
+major_version = 6
+minor_version = 8
 
 requires = []
 for dep in info.get('depends', []):
diff --git a/tryton.cfg b/tryton.cfg
index ecd8916..0a4675a 100644
--- a/tryton.cfg
+++ b/tryton.cfg
@@ -1,5 +1,5 @@
 [tryton]
-version=7.0.10
+version=6.8.16
 depends:
     edocument_uncefact
     party