Ora-01153:an incompatible Media recovery is active

Environment: Oracle 121020
In the Dataguard construction, encountered the ORA-01153 error, prompt as follows:
Ora-01153:an incompatible Media recovery is active
An incompatible media recovery is in progress

This problem is performed twice in succession sql> ALTER DATABASE recover managed standby database using current logfile disconnect from session;
This problem is recommended to cancel the current recovery process directly and redo it.
sql> Recover managed standby database cancel;
Execute the above command, cancel the current recovery operation, and perform the recovery operation again

Reference:
1, https://www.cnblogs.com/landexia/archive/2012/08/17/2643520.html
2, http://blog.csdn.net/yanfalee/article/details/50945840
3, http://f.dataguru.cn/thread-182753-1-1.html

Ora-01153:an incompatible Media recovery is active