frm-40509: unable to update record

UPDATE VEHICLES SET NAME=:1,VEHICLE_CODE=:2,ACTIVE=:3,CLASSIFICATION=:4,TRANSMISSION_TYPE=:5,LPN=:6,VIN=:7,
ENGIN_NUMBER=:8,DESCRIPTION=:9,LICENSE_PER_YEAR=:10,LICENSE_EXPIRE_DATE=:11,PERMIT_DATE_S=:12,
PERMIT_DATE_E=:13,LICENSE_PLACE=:14,LICENSE_TYPE=:15,LICENSE_CATEGORY=:16,INSURANCE_DOCUMENT=:17,
INSURANCE_PER_YEAR=:18,INSURANCE_CATEGORY=:19,FUEL_CODE=:20,FUEL_CARD_ID=:21,METER_CODE=:22,
CURRECT_ODOMETER=:23,PURCHASE_DATE=:24,PURCHASE_VALUE=:25,CURRENT_VALUE=:26,MONTH_TO_DEPRECIATE=:27,
SEGMENT_CODE=:28,ATTACHED_VEHICLE_CODE=:29,CREATION_DATE=:30,CREATOR_USER=:31,MODIFICATION_DATE=:32,
MODIFIED_USER=:33,OWNER_COMPANY=:34 WHERE ROWID=:35

ORA-00060: deadlock detected while waiting for resource

So is there any code in your form that will modify the DB apart from this update?

are there any database triggers on the VEHICLES table?

CREATE OR REPLACE TRIGGER "ADD_VAN_TO_SFIS_STEP1" AFTER
INSERT ON "VEHICLES" REFERENCING OLD AS OLD NEW AS NEW FOR EACH ROW 



BEGIN

DECLARE

    v_exist Number;
    
BEGIN

     select count(*) 
     INTO V_EXIST
     from SFIS_VEHICLES
     where  SFIS_VEHICLES.Vehicle_Code = :NEW.Vehicle_Code ;
     
     if v_exist = 0 then 
       insert into sfis_vehicles
         (vehicle_code,segment_code,classification,vin,lpn, engin_number )
       values
         (:NEW.vehicle_code,:NEW.segment_code,:NEW.classification,:NEW.vin,:NEW.lpn, :NEW.engin_number ) ;
        
     end if ;            
   
    
END;

END;