Unexpected DB error occurred near:

Error After Major FUNC: add_update_counter_master_rec for rec_num: PL1327373853

--> set_rec_field_str called to set: "last_IP_addr" with value: {{54.197.177.123}}
--> set_rec_field_str called to set: "last_date" with value: {{1490596367}}
--> set_rec_field_str called to set: "S1" with value: {{1}}
--> set_rec_field_str called to set: "S2" with value: {{1490486400}}
--> set_rec_field_str called to set: "S3" with value: {{3}}
--> set_rec_field_str called to set: "S4" with value: {{1490400000}}
--> set_rec_field_str called to set: "S5" with value: {{}}
--> set_rec_field_str called to set: "S6" with value: {{1489881600}}
--> set_rec_field_str called to set: "S7" with value: {{}}
--> set_rec_field_str called to set: "S8" with value: {{1488326400}}
--> set_rec_field_str called to set: "S9" with value: {{}}
--> set_rec_field_str called to set: "S10" with value: {{1483228800}}
--> update_record called
*** get_db_error_msg called to return: Error from cbt level ***
===> ISAM error: Error from cbt level data file: Qfiles/Qcounters.db CBT error: key not found function: cbunlock context: finding leaf containing key ----> update_record function FAILED with error: Error from cbt level

DB Error= 1

Error Record's Field Contents:
PL1327373853| I| 1| 28299| A| 54.197.177.123| 1490596367| 1| 1490486400| 3| 1490400000| | 1489881600| | 1488326400| | 1483228800| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |