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: {{54.81.203.33}}
--> set_rec_field_str called to set: "last_date" with value: {{1472054890}}
--> set_rec_field_str called to set: "S1" with value: {{1}}
--> set_rec_field_str called to set: "S2" with value: {{1471996800}}
--> set_rec_field_str called to set: "S3" with value: {{3}}
--> set_rec_field_str called to set: "S4" with value: {{1471910400}}
--> set_rec_field_str called to set: "S5" with value: {{}}
--> set_rec_field_str called to set: "S6" with value: {{1471392000}}
--> set_rec_field_str called to set: "S7" with value: {{}}
--> set_rec_field_str called to set: "S8" with value: {{1470009600}}
--> set_rec_field_str called to set: "S9" with value: {{}}
--> set_rec_field_str called to set: "S10" with value: {{1451606400}}
--> 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| 54.81.203.33| 1472054890| 1| 1471996800| 3| 1471910400| | 1471392000| | 1470009600| | 1451606400| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |