coordinate system - Assigning CRS to Lat/Lon in R giving error: "Geographical CRS given to non-conformant data"

I have a list of suburbs in Queensland, Australia along with their lat/longs.

However, when I try to read in the file in R and assign a CRS, R is giving the following error message:

Error in proj4string<-(*tmp*, value = ) : Geographical CRS given to non-conformant data: 153.53332931

Here are relevant lines of the code,

# Loading suburb list 
qs <- read.csv(file = '../data/Australian_Post_Codes_Lat_Lon.csv', 
               header = TRUE,
               stringsAsFactors = FALSE)


suburb <- qs %>% 
  filter(state == 'QLD') %>% 
  select(postcode,
         suburb,
         lat,
         lon) 

coordinates(suburb) <- c('lat', 'lon')
# Assigning proper Coordinate Reference System (CRS) to Lat/Long.
proj4string(suburb) <- CRS("+init=epsg:4326")

I am using the csv file provided here