diff --git a/docs/source/sls/data_model.md b/docs/source/sls/data_model.md
index 9d469a8e846c636a6005c147fe4252349f7d5550..3134862f2b823dfc6c54ffb711a65a504de39346 100644
--- a/docs/source/sls/data_model.md
+++ b/docs/source/sls/data_model.md
@@ -152,4 +152,3 @@ CD1_1等系数在修改后挪到这一节
 | EXTVER    | 1           | Extension version number   | 1              | int     | C7 |
 | BUNIT    | 'unitless'    | Brightness units           | 'unitless'       | str    | C7 |
 
- C7   |