Voice over Wireless with Cisco phones 7921 and 7925

Hello experts,
I made an wireless audit for a company.
They have 2 WLCs 5508 in HA mode, with APs 2602 for indoor and 1552. Version of the WLC : 7.6.120.0
At the end of the day we noticed that the roaming between indoor and outdoor access points is sometimes failing and results to a complete disconnection of the wireless phone (7921 or 7925) from the network. When people go from the indoor to the outdoor area, there is no problem. The problem comes when people are coming from the outdoor to the indoor.
Also, on the WLC, the power lvl of the outdoor APs are set to 1 ... Is it good or not ?
My question is, is there any known issue about Voice over wireless with WLC 5508-7.6.120.0 with APs 2602 and 1552 ?
Maybe it should be better to upgrade to 7.6.130.0 ?
Thanks in advance,
Alexis

Normally yes.
Is there a way to troubleshoot what's going on with the phones ? Maybe a "show client detail MAC address* on the WLC ?
Here are some logs when the phones are losing the network :
*Dot1x_NW_MsgTask_4: Apr 09 12:44:21.320: #DOT1X-3-INVALID_WPA_KEY_MSG_STATE: 1x_eapkey.c:957 Received invalid EAPOL-key M2 msg in START state - invalid secure bit; KeyLen 40, Key type 1, client 00:24:d7:83:56:dc
*apfMsConnTask_6: Apr 09 12:28:32.668: #APF-3-VALIDATE_CCKM_REASS_REQ_ELEMENT: apf_utils.c:2506 Could not validate the CCKM Reassociation request element.Received Timestamp deviation > 1sec in CCKM Info Element from mobile. Mobile:4c:00:82:85:6e:e1, AP:1
*Dot1x_NW_MsgTask_1: Apr 09 12:26:53.964: #DOT1X-3-INVALID_REPLAY_CTR: 1x_eapkey.c:445 Invalid replay counter from client 74:26:ac:63:8c:a9 - got 00 00 00 00 00 00 00 03, expected 00 00 00 00 00 00 00 04
*Dot1x_NW_MsgTask_1: Apr 09 12:26:53.929: #DOT1X-3-INVALID_REPLAY_CTR: 1x_eapkey.c:445 Invalid replay counter from client 74:26:ac:63:8c:a9 - got 00 00 00 00 00 00 00 02, expected 00 00 00 00 00 00 00 04
*apfMsConnTask_4: Apr 09 12:24:34.959: #APF-3-VALIDATE_CCKM_REASS_REQ_ELEMENT: apf_utils.c:2506 Could not validate the CCKM Reassociation request element.Received Timestamp deviation > 1sec in CCKM Info Element from mobile. Mobile:78:da:6e:f6:5f:89, AP:5
*Dot1x_NW_MsgTask_0: Apr 09 12:22:30.217: #DOT1X-3-INVALID_REPLAY_CTR: 1x_eapkey.c:445 Invalid replay counter from client 4c:00:82:85:1d:68 - got 00 00 00 00 00 00 00 03, expected 00 00 00 00 00 00 00 04
*Dot1x_NW_MsgTask_4: Apr 09 12:22:30.206: #DOT1X-3-INVALID_REPLAY_CTR: 1x_eapkey.c:445 Invalid replay counter from client 4c:00:82:85:b3:ac - got 00 00 00 00 00 00 00 03, expected 00 00 00 00 00 00 00 04
*Dot1x_NW_MsgTask_4: Apr 09 12:22:30.186: #DOT1X-3-INVALID_REPLAY_CTR: 1x_eapkey.c:445 Invalid replay counter from client 4c:00:82:85:b3:ac - got 00 00 00 00 00 00 00 02, expected 00 00 00 00 00 00 00 04
*Dot1x_NW_MsgTask_0: Apr 09 12:22:30.167: #DOT1X-3-INVALID_REPLAY_CTR: 1x_eapkey.c:445 Invalid replay counter from client 4c:00:82:85:1d:68 - got 00 00 00 00 00 00 00 02, expected 00 00 00 00 00 00 00 04
*Dot1x_NW_MsgTask_6: Apr 09 12:22:29.672: #DOT1X-3-INVALID_REPLAY_CTR: 1x_eapkey.c:445 Invalid replay counter from client 78:da:6e:f6:14:2e - got 00 00 00 00 00 00 00 03, expected 00 00 00 00 00 00 00 04
*Dot1x_NW_MsgTask_6: Apr 09 12:22:29.638: #DOT1X-3-INVALID_REPLAY_CTR: 1x_eapkey.c:445 Invalid replay counter from client 78:da:6e:f6:14:2e - got 00 00 00 00 00 00 00 02, expected 00 00 00 00 00 00 00 04
*apfMsConnTask_3: Apr 09 12:19:22.098: #APF-3-VALIDATE_CCKM_REASS_REQ_ELEMENT: apf_utils.c:2506 Could not validate the CCKM Reassociation request element.Received Timestamp deviation > 1sec in CCKM Info Element from mobile. Mobile:4c:00:82:85:6e:e1, AP:5
*osapiBsnTimer: Apr 09 12:13:36.031: #LOG-3-Q_IND: spam_lrad.c:53542 The system is unable to find WLAN 2 to be deleted

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Kind regards,
Igor

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