Last Modified: Aug 19, 2026
Affected Product(s):
BIG-IP Install/Upgrade, LTM
Known Affected Versions:
11.5.1, 11.5.1 hf1, 11.5.1 hf2, 11.5.1 hf3, 11.5.1 hf4, 11.5.1 hf5, 11.5.1 hf6, 11.5.1 hf7, 11.5.1 hf8, 11.5.1 hf9, 11.5.1 hf10, 11.5.1 hf11, 11.5.2, 11.5.2 hf1, 11.5.3, 11.5.3 hf1, 11.5.3 hf2, 11.5.4, 11.5.4 hf1, 11.5.4 hf2, 11.5.4 hf3, 11.5.4 hf4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10, 11.6.0, 11.6.0 hf1, 11.6.0 hf2, 11.6.0 hf3, 11.6.0 hf4, 11.6.0 hf5, 11.6.0 hf6, 11.6.0 hf7, 11.6.0 hf8, 11.6.1, 11.6.1 hf1, 11.6.1 hf2, 11.6.2, 11.6.2 hf1, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 11.6.5, 11.6.5.1, 11.6.5.2, 11.6.5.3, 12.0.0, 12.0.0 hf1, 12.0.0 hf2, 12.0.0 hf3, 12.0.0 hf4
Fixed In:
12.1.0
Opened: Apr 15, 2015 Severity: 3-Major Related Article:
K51404143
The configuration might fail to load upon upgrade to the affected version if the internal data-group with string type has records that contain open/close brace under data attribute. The error message can differ depending on your exact configuration.
Upgrade to the affected version fails.
Internal data-group exists with string type and has records that contain open/close brace under data attribute. For example: ltm data-group internal /Common/my_data_group { records { first_record { data } } second_record { data { } } type string } This can trigger when upgrading to any version prior to 12.1.0
After upgrade, correct the syntax of the data-group in /config/bigip.conf and then load the config again, e.g., tmsh load sys config.
The configuration now loads successfully upon upgrade, and no longer produces an error if the internal data-group with string type has records that contain open/close brace under data attribute.