R語言無法在postgresql中使用postgresqlWriteTable插入

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我是R新手，嘗試在R Postgresql中插入R數據幀。每次每當我嘗試執行我的rscripts.R，我收到以下錯誤：R語言無法在postgresql中使用postgresqlWriteTable插入

「在postgresqlWriteTable（康涅狄格州，名稱，價值，...）：中止assignTable：表customervalidation在數據庫中存在」

表customervalidation已經存在於postgresql中，我試圖在這個表中插入SampleData.csv的內容。 csv的所有標題都已經存在於表格中，並且全部都是小寫字母。

命令行參數

./script.R batch SampleData.csv yes no

rscripts.R內容

#!/usr/bin/Rscript 

options(echo=TRUE) # if you want see commands in output file 
args <- commandArgs(trailingOnly = TRUE) 
print(args) 
# trailingOnly=TRUE means that only your arguments are returned, check: 
# print(commandsArgs(trailingOnly=FALSE)) 

batchIndicator <- tolower(args[1]) 
filename <- args[2] 
isHeaderPresent <-args[3] 
isRunTheBatch<-args[4] 
rm(args) 
#Library files 
library(RPostgreSQL) 
#now check whether it is immediate or batch. 
# if it is immediate then real time prediction needs to prepare. 
# if it is batch then whole batch set needs to prepare and keep the results in a separate file. 
if(isHeaderPresent == "yes") 
{ 
    header = TRUE 
}else 
{ 
    if(isHeaderPresent == "no"){ 

    header = FALSE 
    } 
} 

    print(paste("Processing for Batch mode for filename ", filename)) 
    # Start body for other function 
    data <-read.csv(filename,header = header, sep=",") 
    drv <- dbDriver("PostgreSQL") 
    con <- dbConnect(PostgreSQL(), dbname = "customervalidation", host = "localhost", port =5432 , user = "user", password = "pwd") 
    dbWriteTable(con,"customervalidation",data,row.names=FALSE) 
    #end body for other function

而且SampleData.csv 的內容