Sqlite throws API Misuse error while inserting a record in iOS

I've been working on to insert a record into the database and I get an API misuse error from Sqlite. Though it throws an error, all the records are inserted properly whenever an insert operation is performed. The issue started happening after I added Sqlitebusytimeout to handle concurrency in multi threaded environment when opening a database connection.

//OpenDatabase connection  func openDatabase(path:String) -> OpaquePointer? {        var db: OpaquePointer? = nil        //Sqlite random crash handle        sqlite3_busy_timeout(db, 500)        if sqlite3_open_v2(path, &db, SQLITE_OPEN_READWRITE|SQLITE_OPEN_FULLMUTEX|SQLITE_OPEN_CREATE, nil) == SQLITE_OK {            //            print("sql Successfully opened connection to database at \(path)")        } else {            print("sql Unable to open database. Verify that you created the directory described " +"in the Getting Started section.")        }        return db    }

All the sqlite operations are performed inside a queue to avoid concurrency.

//Insert Sale caller                SQLite.shared.databaseQueue.sync(execute: {() -> Void in                    // do your database activity here                    SQLite.shared.insert(sale: check)                })

Sqlite misuse error in console

2021-05-03 19:55:18.757183-0400 Linga POS[17756:14991901] [logging] API call with NULL database connection pointer2021-05-03 19:55:18.757317-0400 Linga POS[17756:14991901] [logging] misuse at line 163599 of [378230ae7f]

I want to know how this error could be resolved or is it a warning to ignore as all records are being inserted as required.

//Database queue to avoid concurrency    var databaseQueue = DispatchQueue(label: "com.app.database", qos: .background, attributes: .concurrent, autoreleaseFrequency: .inherit, target: nil)//Insert sale method    func insert(sale model: SocketSale) {        if model.checkId.isEmpty {            return        }        if model.status == TableServiceViewController.onHoldStr {            UserDefaults.standard.set(true, forKey: "StartHoldTimer")        }        var isServiceTypeChanged = 0        isServiceTypeChanged = getServiceTypeChanged(checkId: model.checkId)        var insertStatement: OpaquePointer? = nil        let insertStatementString = "REPLACE INTO myTable (driver, customerPhoneNumber, sale, isServiceTypeChanged) VALUES (?, ?, ?, ?);"        let db = openDatabase(path:dbPath)        //Sqlite random crash handle        sqlite3_busy_timeout(db, 500)        // 1        if sqlite3_prepare_v2(db, insertStatementString, -1, &insertStatement, nil) == SQLITE_OK {            // 2            sqlite3_bind_text(insertStatement, 1, (model.customerName as NSString).utf8String, -1, nil)            sqlite3_bind_text(insertStatement, 2, (model.ticketNo as NSString).utf8String, -1, nil)            sqlite3_bind_text(insertStatement, 3, (model.checkId as NSString).utf8String, -1, nil)            sqlite3_bind_text(insertStatement, 4, (model.outEmployeeName as NSString).utf8String, -1, nil)            let result = sqlite3_step(insertStatement);            if result == SQLITE_DONE {                print("sql Successfully inserted row.")                 insertCounter = 0            } else {                print("sql Could not insert row.")                if result == SQLITE_BUSY {                    if db != nil {                        sqlite3_close(db!)                                self.insertCounter = self.insertCounter + 1                                ShareDataController.ShareDataInstance.shareInstanceQueue.async(execute: {                                    ShareDataController.ShareDataInstance.postEventLog(model.sale, eventType: "recreateSqliteFile Sale", saleUniqueId:  model.checkId)                                })                               // if self.insertCounter == 1 && self.db != nil {                                    if self.insertCounter == 1 {//                                    SQLite.shared.databaseQueue.sync(execute: {() -> Void in                                        // do your database activity here                                        self.insert(sale: model)//                                    })                            }                    }                }                if result == SQLITE_CORRUPT {                    print("sql Recreate SQLite")                    if db != nil {                        sqlite3_close(db!)                    }                    recreateSqliteFile(sqlFile: databaseFileName, completion: { (result) in                        ShareDataController.ShareDataInstance.shareInstanceQueue.async(execute: {                            ShareDataController.ShareDataInstance.postEventLog(model.sale, eventType: "recreateSqliteFile Sale", saleUniqueId:  model.checkId)                        })                        if result {                            self.insertCounter = 0//                            SQLite.shared.databaseQueue.sync(execute: {() -> Void in                                // do your database activity here                                self.insert(sale: model)//                            })                        }                    })                }            }            sqlite3_reset(insertStatement)        } else {            print("sql INSERT statement could not be prepared.")            if db != nil {            sqlite3_close(db!)            }            reInitiateSaleDatabase(checkId: "SQLITE Error", logStr: "INSERT statement could not be prepared.")             insertCounter = 0        }        // 5        sqlite3_finalize(insertStatement)        if db != nil {        sqlite3_close(db)        }    }//Method to reinit database when it is corrupted    func reInitiateSaleDatabase(checkId:String,logStr:String) {        //closeDB(databaseName: databaseFileName) { (result) in           // self.db = nil            self.dbPath = ""            self.initDBPath()            self.createSaleTable()            UserDefaults.standard.setValue("0", forKey: "dataVersion")            self.syncData { (posted) in            }    }