Unexpected DB error occurred near:

Error After Major FUNC: add_update_counter_master_rec for rec_num: 4

--> set_rec_field_str called to set: "last_IP_addr" with value: {{54.144.217.153}}
--> set_rec_field_str called to set: "last_date" with value: {{1425156271}}
--> set_rec_field_str called to set: "S1" with value: {{1}}
--> set_rec_field_str called to set: "S2" with value: {{1425081600}}
--> set_rec_field_str called to set: "S3" with value: {{11}}
--> set_rec_field_str called to set: "S4" with value: {{1424995200}}
--> set_rec_field_str called to set: "S5" with value: {{}}
--> set_rec_field_str called to set: "S6" with value: {{1424476800}}
--> set_rec_field_str called to set: "S7" with value: {{}}
--> set_rec_field_str called to set: "S8" with value: {{1422748800}}
--> set_rec_field_str called to set: "S9" with value: {{}}
--> set_rec_field_str called to set: "S10" with value: {{1420070400}}
--> 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:
4| I| 1| 62928| A| 54.144.217.153| 1425156271| 1| 1425081600| 11| 1424995200| | 1424476800| | 1422748800| | 1420070400| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |