我遇到了严重的问题Cassandra有单节点。我从datastax devcenter运行drop materialize view/tables all together（差不多10-15个drop语句，创建了表/视图查询），但它抛出了操作失败错误，cassandra也跟着它走了。
当我开始做Cassandra的时候失败了。Cassandra日志显示：

Exception (java.lang.AssertionError) encountered during startup: Table keyspace.table did not have any partition key columns in the schema tables
ERROR 08:19:00 Exception encountered during startup
java.lang.AssertionError: Table keyspace.table did not have any partition key columns in the schema tables
at org.apache.cassandra.schema.SchemaKeyspace.fetchTable(SchemaKeyspace.java:950) ~[apache-cassandra-3.9.0.jar:3.9.0]
at org.apache.cassandra.schema.SchemaKeyspace.fetchTables(SchemaKeyspace.java:925) ~[apache-cassandra-3.9.0.jar:3.9.0]
at org.apache.cassandra.schema.SchemaKeyspace.fetchKeyspace(SchemaKeyspace.java:888) ~[apache-cassandra-3.9.0.jar:3.9.0]
at org.apache.cassandra.schema.SchemaKeyspace.fetchKeyspacesWithout(SchemaKeyspace.java:865) ~[apache-cassandra-3.9.0.jar:3.9.0]
at org.apache.cassandra.schema.SchemaKeyspace.fetchNonSystemKeyspaces(SchemaKeyspace.java:853) ~[apache-cassandra-3.9.0.jar:3.9.0]
at org.apache.cassandra.config.Schema.loadFromDisk(Schema.java:136) ~[apache-cassandra-3.9.0.jar:3.9.0]
at org.apache.cassandra.config.Schema.loadFromDisk(Schema.java:126) ~[apache-cassandra-3.9.0.jar:3.9.0]
at org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:260) [apache-cassandra-3.9.0.jar:3.9.0]
at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:601) [apache-cassandra-3.9.0.jar:3.9.0]
at org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:730) [apache-cassandra-3.9.0.jar:3.9.0]

现在我该怎么处理这个案子？