HT201269 have downloaded songs to my iphone 4 they are showing 306 as downloads but when i try to play them it saysdownload error please try later?

trying to download songs to my iphone that are on my ipad they are showing up on my phone but keeps telling me to re try later to download to phone showing in red 306 songs in download

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Select the songs and go to Edit > Delete. Then, download the music in iTunes Store