error when sync table fields

[JaphyFan]

WARN sync.util :: sync form "form 615“XXXX”"fields failed java.lang.AssertionError: Assert failed: (instance? Connection conn) at metabase.driver.sql_jdbc.sync.describe_table$fields_metadata.invokeStatic(describe_table.clj:96) at metabase.driver.sql_jdbc.sync.describe_table$fields_metadata.doInvoke(describe_table.clj:96) at clojure.lang.RestFn.invoke(RestFn.java:467) at metabase.driver.sql_jdbc.sync.describe_table$describe_table_fields.invokeStatic(describe_table.clj:142) at metabase.driver.sql_jdbc.sync.describe_table$describe_table_fields.doInvoke(describe_table.clj:130) at clojure.lang.RestFn.invoke(RestFn.java:445) at metabase.driver.kylin$eval625$fn626.invoke(kylin.clj:67) at clojure.lang.MultiFn.invoke(MultiFn.java:239) at metabase.sync.fetch_metadata$fn__61449$table_metadata61454$fn61455.invoke(fetch_metadata.clj:18) at metabase.sync.fetch_metadata$fn61449$table_metadata61454.invoke(fetch_metadata.clj:15) at metabase.sync.sync_metadata.fields.fetch_metadata$fn__61771$db_metadata61776$fn61777.invoke(fetch_metadata.clj:87) at metabase.sync.sync_metadata.fields.fetch_metadata$fn__61771$db_metadata61776.invoke(fetch_metadata.clj:83) at metabase.sync.sync_metadata.fields$fn62264$sync_fields_for_table_BANG_62273$fn62276$fn__62277.invoke(fields.clj:72) at metabase.sync.util$do_with_error_handling.invokeStatic(util.clj:151) at metabase.sync.util$do_with_error_handling.invoke(util.clj:144) at metabase.sync.sync_metadata.fields$fn62264$sync_fields_for_table_BANG_62273$fn__62276.invoke(fields.clj:71) at metabase.sync.sync_metadata.fields$fn62264$sync_fields_for_table_BANG_62273.invoke(fields.clj:65) at clojure.core$partial$fn5839.invoke(core.clj:2624) at clojure.core$map$fn__5866.invoke(core.clj:2753) at clojure.lang.LazySeq.sval(LazySeq.java:42) at clojure.lang.LazySeq.seq(LazySeq.java:51)

[JaphyFan]

could you please tell me which version of metabase you are using, thanks!!