ORA-00600: internal error code, arguments: [kdsgrp1], [], [], [], [], [], [], []
I usually solve it recreating the index or indexes of the affected table
To know and generate the sentences to rebuild the index/indexes from the affected table use this sentence
select 'alter index ' ||owner|| '.' ||index_name|| ' rebuild;' from dba_indexes where table_name='affected table name';
For example, to rebuild all indexes from a table named test01 and owner Gorka, the steps will be....
1.- SQL> select 'alter index ' ||owner|| '.' ||index_name|| ' rebuild;' from dba_indexes where table_name='TEST01';
'ALTERINDEX'||OWNER||'.'||INDEX_NAME||'REBUILD;'
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alter index gorka.test_index01 rebuild;
alter index gorka.test_index_PK rebuild;
alter index gorka.test_index02 rebuild;
alter index gorka.test_index03 rebuild;
4 rows selected.
2.- execute the sentences generated (copy the list and paste in sqlplus and then return)
SQL>
Index altered.
SQL>
Index altered.
SQL>
Index altered.
SQL>
Index altered.