I used this piece of code to merge data from scopus and Web Of Science and deduplicate data.

library(bibliometrix)
library(writexl)

wos_data <- convert2df(
  file = "/data/web of science 2022.txt", 
  dbsource = "wos", 
  format = "plaintext")

scopus_data <- convert2df(
  file = "/data/scopus 2022.csv", 
  dbsource = "scopus", 
  format = "csv")

merged_data <- mergeDbSources(
  wos_data, 
  scopus_data, 
  remove.duplicated = TRUE)

write.csv(merged_data, 
          file = "/data/merged_data 2022.csv", 
          row.names = FALSE)

Now, I need to do a co-occurence network analyse and vosviewer needs a .txt file for Web of Science data and a csv file. So I did several tries but each time format is not correct or it's only possible to do a co-authorship analysis. Do someone has already this job and could help me ?