ORA-19751-could not create the change tracking file , ORA-19750,ORA-17501,ORA-17503-diskgroup "DGDATA" does not exist or is not mounted

Let’s make it simple to solve the problem:

# Error:

SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-19751: could not create the change tracking file
ORA-19750: change tracking file: '+DGDATA/mydb/changetracking/ctf.470.859997781'
ORA-19750: ksfdcre:1 Failed to create file +DGDATA/mydb/changetracking/ctf.470.859997781
ORA-17501: logical block size 4294967295 is invalid
ORA-15001: diskgroup "DGDATA" does not exist or is not mounted
ORA-17503: ksfdopn:2 Failed to open file +DGDATA/mydb/changetracking/ctf.470.859997781
ORA-15001: diskgroup "DGDATA" does not exist or is not mounted
ORA-15001: diskgroup "DGDATA" does not exist or is not mounted

SQL> alter database disable BLOCK CHANGE TRACKING;
Database altered.
SQL> alter database open;
Database altered.