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$eval625$fn__626.invoke(kylin.clj:67)
at clojure.lang.MultiFn.invoke(MultiFn.java:239)
at metabase.sync.fetch_metadata$fn__61449$table_metadata__61454$fn__61455.invoke(fetch_metadata.clj:18)
at metabase.sync.fetch_metadata$fn__61449$table_metadata__61454.invoke(fetch_metadata.clj:15)
at metabase.sync.sync_metadata.fields.fetch_metadata$fn__61771$db_metadata__61776$fn__61777.invoke(fetch_metadata.clj:87)
at metabase.sync.sync_metadata.fields.fetch_metadata$fn__61771$db_metadata__61776.invoke(fetch_metadata.clj:83)
at metabase.sync.sync_metadata.fields$fn__62264$sync_fields_for_table_BANG___62273$fn__62276$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$fn__62264$sync_fields_for_table_BANG___62273$fn__62276.invoke(fields.clj:71)
at metabase.sync.sync_metadata.fields$fn__62264$sync_fields_for_table_BANG___62273.invoke(fields.clj:65)
at clojure.core$partial$fn__5839.invoke(core.clj:2624)
at clojure.core$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!!